WO2021185074A1 - 电池外壳、电池和电子设备 - Google Patents

电池外壳、电池和电子设备 Download PDF

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Publication number
WO2021185074A1
WO2021185074A1 PCT/CN2021/078680 CN2021078680W WO2021185074A1 WO 2021185074 A1 WO2021185074 A1 WO 2021185074A1 CN 2021078680 W CN2021078680 W CN 2021078680W WO 2021185074 A1 WO2021185074 A1 WO 2021185074A1
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WO
WIPO (PCT)
Prior art keywords
cover
battery
hole
equal
insulating member
Prior art date
Application number
PCT/CN2021/078680
Other languages
English (en)
French (fr)
Inventor
许德胜
王永旺
卫志达
曾玉祥
陈龙云
林鸿凯
彭宁
谢斌
Original Assignee
珠海冠宇电池股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202020339309.4U external-priority patent/CN211238301U/zh
Priority claimed from CN202021331670.9U external-priority patent/CN212434725U/zh
Priority claimed from CN202110201053.XA external-priority patent/CN113013524B/zh
Application filed by 珠海冠宇电池股份有限公司 filed Critical 珠海冠宇电池股份有限公司
Priority to EP21770741.3A priority Critical patent/EP4102623A4/en
Priority to KR1020227036284A priority patent/KR20230023608A/ko
Publication of WO2021185074A1 publication Critical patent/WO2021185074A1/zh
Priority to US17/929,709 priority patent/US20220416337A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
    • H01M50/143—Fireproof; Explosion-proof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/155—Lids or covers characterised by the material
    • H01M50/157—Inorganic material
    • H01M50/159—Metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/155—Lids or covers characterised by the material
    • H01M50/164—Lids or covers characterised by the material having a layered structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/179—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/271—Lids or covers for the racks or secondary casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • This application relates to battery technology, in particular to a battery casing, battery and electronic equipment.
  • Button battery also called button battery, refers to a battery whose shape and size are like a small button. Generally speaking, it has a larger diameter and a thinner thickness. Because of their small size, button batteries have been widely used in various miniature electronic products, such as wearable devices: wireless earphones, sports watches, bracelets, rings and other electronic products. Since the inside of the battery is a closed space, sealing performance is extremely important for the battery.
  • the button battery includes a cylindrical casing and a cylindrical casing cover arranged on the outside of the cylindrical casing.
  • a sealing ring is arranged between the outer wall of the casing and the inner wall of the casing cover. The sealing between the three is generally through an interference fit.
  • the battery made by interference fit between the casing, the sealing ring and the casing cover has poor sealing performance.
  • the present application provides a battery casing, a battery and an electronic device, which solves the technical problem of poor sealing performance of the battery made by interference fit between the casing, the sealing ring and the casing cover.
  • the first aspect of the application provides a battery casing
  • a housing Including: a housing, a first cover, a first insulator and a second cover, wherein:
  • the housing includes a bottom wall and a side wall connected to the bottom wall; the first cover includes a first surface and a second surface that are opposed to each other, and the second cover includes a third surface and a third surface that are opposed to each other.
  • the first surface of the first cover body is connected to an end of the side wall away from the bottom wall, and the second surface of the first cover body is connected to the side wall through the first insulating member
  • the third surface of the second cover body is connected, the first cover body is provided with a first through hole, and the first insulating member is provided with a second through hole corresponding to the first through hole.
  • the battery case is used to wrap the outside of the battery cell, the first cover is a metal ring, the first insulator is an insulating ring, and the second cover is a metal sheet;
  • the side wall is an annular side wall , The bottom end of the side wall is connected to the bottom wall, and the top end of the side wall has an opening;
  • the bottom end surface of the first cover body is connected to the opening end surface, the area enclosed by the inner edge of the first cover body is the first through hole, and the area enclosed by the inner edge of the first insulating member Is the second through hole, and the first through hole and the second through hole at least partially overlap;
  • An annular groove or rib is ring-shaped on one end surface of the second cover body facing the first cover body, and the ring groove or rib is located in an area directly opposite to the second through hole.
  • It also includes: a second solder joint, the second cover body is used for soldering with the tab of the battery to form the second solder joint, the second solder joint is directly facing the annular groove or the rib The area enclosed by the edge.
  • the projection of the inner edge of the first cover on the bottom wall is located within the projection of the first insulating member on the bottom wall.
  • the outer diameter of the first insulating member is greater than or equal to the outer diameter of the first cover
  • the outer diameter of the first insulating member is greater than or equal to the outer diameter of the second cover.
  • the distance between the annular groove or the convex edge and the center of the second cover body is greater than or equal to 2 mm and less than or equal to 14 mm.
  • the width of the annular groove or rib is greater than or equal to 0.05 mm and less than or equal to 2 mm;
  • the groove depth of the annular groove or the height of the rib is greater than or equal to 0.02 mm and less than or equal to 0.4 mm.
  • the bottom wall is a conical surface or a spherical surface.
  • the height of the conical surface or the spherical surface is greater than or equal to 0.05 mm.
  • the battery casing is provided with at least one explosion-proof groove in at least one of the following positions:
  • a fifth surface of the bottom wall of the housing where the fifth surface is a surface of the bottom wall facing outward;
  • a sixth surface of the side wall of the housing where the sixth surface is a surface of the side wall facing outward;
  • the length of the at least one explosion-proof groove is 0.2 to 0.8 times the diameter of the bottom wall
  • the width of the at least one explosion-proof groove is 0.2 to 0.8 times the diameter of the bottom wall
  • the depth of the at least one explosion-proof groove It is 0.2 to 0.8 times the thickness of the bottom wall.
  • the at least one explosion-proof groove extends along the thickness direction of the housing; the length of the at least one explosion-proof groove is 0.2 to 0.8 times the thickness of the housing, and the width of the at least one explosion-proof groove is the side wall 0.003 to 0.2 times the circumference, and the depth of the at least one explosion-proof groove is 0.2 to 0.8 times the thickness of the side wall.
  • the length of the at least one explosion-proof groove is 0.2 to 0.8 times the diameter of the second cover
  • the width of the at least one explosion-proof groove is 0.2 to 0.8 times the diameter of the second cover
  • the at least one The depth of the explosion-proof groove is 0.2 to 0.8 times the thickness of the second cover.
  • the shell and the first cover are welded or welded.
  • the first cover body and the first insulating part are connected by welding, welding or injection molding; the second cover body and the first insulating part are connected by welding, welding or injection molding.
  • the inner edge of the first insulating member is covered with a ring-shaped glue layer, and the inner edge of the first insulating member and the first cover and the second cover are sealed by a glue layer.
  • the outer diameter of the first cover is greater than or equal to 8 mm and less than or equal to 16 mm;
  • the distance from the inner edge of the first cover to the center of the first cover is greater than or equal to 3 mm and less than or equal to 14 mm;
  • the thickness of the first cover is greater than or equal to 0.05 mm and less than or equal to 0.5 mm.
  • the outer diameter of the first insulating member is greater than or equal to 8 mm and less than or equal to 16 mm;
  • the distance from the inner edge of the first insulating member to the center of the first insulating member is greater than or equal to 2 mm and less than or equal to 14 mm;
  • the thickness of the first insulating member is greater than or equal to 0.05 mm and less than or equal to 0.5 mm.
  • the diameter of the second cover is greater than or equal to 6 mm and less than or equal to 16 mm;
  • the thickness of the second cover is greater than or equal to 0.05 mm and less than or equal to 0.5 mm.
  • the second aspect of the application provides a battery
  • the battery cell includes a first tab and a second tab, the first tab is connected to the first surface of the first cover, and the second tab is connected to the third tab of the second cover. ⁇ Surface connection.
  • the third aspect of the present application provides a battery
  • the packaging shell is provided with a accommodating cavity for accommodating the cell, a cavity coaxial with the cell is formed in the cell, and the packaging shell is provided with a cavity that is coaxial with the cell.
  • the second cover is a conductive member, and the first insulating member is a sealing rubber ring.
  • the second cover is provided with a protruding portion protruding toward the accommodating cavity, a first overflow groove is formed between the protruding portion and the edge of the hole, and the first overflow groove is
  • the radial width of the battery core is between 0.1 and 3 mm.
  • the packaging shell is provided with a containing groove, the second cover is located in the containing groove, and a second overflow is formed between the outer edge of the second cover and the side groove wall of the containing groove.
  • Glue groove, the width of the second glue overflow groove along the radial direction of the battery is 0.1-3mm.
  • a first insulating glue layer is arranged between the lower end surface of the battery core and the inner wall of the bottom wall of the encapsulation shell, and a third through hole coaxial with the cavity is arranged on the first insulating glue layer.
  • the diameter of the third through hole is larger than the diameter of the cavity.
  • the diameter of the third through hole is 0-0.5 mm larger than the diameter of the cavity.
  • a second insulating glue layer is arranged between the upper end surface of the battery core and the inner top wall of the packaging shell, and a fourth through hole coaxial with the cavity is arranged on the second insulating glue layer.
  • the diameter of the fourth through hole is larger than the diameter of the cavity.
  • the diameter of the fourth through hole is 0-0.5 mm larger than the diameter of the cavity.
  • the packaging shell includes a housing and a first cover, the first cover is in sealing connection with the housing, and the housing and the first cover are enclosed to form a housing for accommodating the battery core In the accommodating cavity, the hole communicating with the accommodating cavity is provided on the first cover;
  • the battery is provided with a first tab and a second tab.
  • the first tab is electrically connected to the inner wall of the bottom wall of the housing, and the second tab is electrically connected to the second cover. connect;
  • a third insulating glue layer is provided between the second tab and the first cover
  • the edge of the hole is surrounded to form a first through hole.
  • the third insulating glue layer is attached to the inner wall of the first cover, and along the radial direction of the battery core, the outer edge of the third insulating glue layer is smaller than the outer edge of the first cover;
  • the third insulating adhesive layer is further provided with a fifth through hole, the fifth through hole is coaxial with the cavity, and the aperture of the fifth through hole is smaller than the size of the hole in the radial direction.
  • the outer edge of the third insulating glue layer is 0.05-2 mm smaller than the edge size of the first cover;
  • the diameter of the fifth through hole is 0-2 mm smaller than the size of the hole in the radial direction.
  • the third insulating glue layer is attached to the side of the second tab close to the first cover, and along the radial direction of the battery core, the edge of the third insulating glue layer is away from the battery core
  • the distance of the axis is less than the distance of the hole from the axis of the battery.
  • a concave solder mark is provided on the surface of the first tab facing the battery core, and the solder mark is located in an area corresponding to the third through hole and the cavity.
  • the outer side of the bottom wall of the shell is a smooth plane or arc surface.
  • the depth of the solder mark is 20-200 ⁇ m; or, the height of the first solder joint formed after soldering is 10-120 ⁇ m.
  • a sealant is also provided in the second glue overflow groove, and the sealant is used to seal the gap between the second cover and the packaging shell.
  • the fourth aspect of the present application provides an electronic device
  • the battery case, battery, and electronic device provided by the present application include: a casing, a first cover, a first insulator, and a second cover, wherein: the casing includes a bottom wall and a side wall connected to the bottom wall; The cover includes a first surface and a second surface that are opposed to each other. The second cover includes a third surface and a fourth surface that are opposed to each other. The first surface of the first cover is connected to an end of the side wall away from the bottom wall. The second surface of the cover body is connected to the third surface of the second cover body through the first insulating member.
  • the first cover body is provided with a first through hole
  • the first insulating member is provided with a second through hole corresponding to the first through hole. hole.
  • the structure in which the casing, the first cover, the first insulator, and the second cover are connected in sequence can improve the sealing performance of the battery as a whole. Therefore, the battery casing, battery and electronic device provided by the present application solve the technical problem of poor sealing performance of the battery made by interference fit between the casing, the sealing ring and the casing cover.
  • FIG. 1 is a front view of a battery case provided in Embodiment 1 of this application;
  • Figure 2 is a cross-sectional view taken along E-E in Figure 1;
  • FIG. 3 is a partial enlarged view of a battery casing provided in Embodiment 1 of the application; FIG.
  • FIG. 4 is a schematic diagram of the appearance of a battery case provided in Embodiment 1 of the application;
  • FIG. 5 is a cross-sectional view of a battery provided in Embodiment 1 of the application.
  • FIG. 6 is a front view of the battery case provided in the second embodiment of the application.
  • FIG. 7 is a cross-sectional view of the battery case provided in the second embodiment of the application after being assembled into a battery;
  • FIG. 8 is a front view of the cover of the battery housing provided in the second embodiment of the application.
  • FIG. 9 is a cross-sectional view of the cover of the battery housing provided in the second embodiment of the application.
  • FIG. 10 is a bottom view of the cover of the battery housing provided in the second embodiment of the application.
  • FIG. 11 is a cross-sectional view of the second cover in the battery housing provided in the second embodiment of the application.
  • FIG. 12 is a bottom view of the second cover in the battery housing provided in the second embodiment of the application.
  • FIG. 13 is a bottom view of the connection between the shell cover and the second tab of the battery housing provided in the second embodiment of the application;
  • FIG. 14 is a schematic structural diagram of a battery provided in Embodiment 3 of the application.
  • 15 is a schematic diagram of an exploded structure of the battery provided in the third embodiment of the application.
  • FIG. 16 is a schematic diagram of an internal structure of a battery provided in Embodiment 3 of the application.
  • FIG. 17 is a schematic diagram of another internal structure of the battery provided in the third embodiment of the application.
  • FIG. 18 is a schematic diagram of the structure of the first insulating glue layer in the battery provided in the third embodiment of the application.
  • 160 Explosion-proof tank; 20: battery cell; 210: first pole ear;
  • 220 second pole ear
  • 221 second solder joint
  • 230 cavity
  • 501 the third through hole
  • 502 the first all sides
  • 60 the second insulating adhesive layer
  • 601 fourth through hole
  • 602 second trimming
  • 70 third insulating adhesive layer
  • 701 fifth through hole; 80: sealing nail.
  • Button battery also called battery, refers to a battery with a small button shape and generally larger diameter and thinner thickness. Because of their small size, button batteries have been widely used in various miniature electronic products, such as wearable devices: wireless earphones, sports watches, bracelets, rings and other electronic products. Since the inside of the battery is a closed space, sealing performance is extremely important for the battery.
  • the battery includes a cylindrical casing and a cylindrical casing cover arranged on the outside of the cylindrical casing.
  • a sealing ring is arranged between the outer wall of the casing and the inner wall of the casing cover to realize the The sealing between the three is generally through an interference fit.
  • the battery made by interference fit between the casing, the sealing ring and the casing cover has poor sealing performance.
  • the embodiments of the present application provide a battery case, a battery, and an electronic device.
  • a structure in which the second cover body is connected to the second cover body through a first insulator outside the first cover body makes the battery case more tightly sealed. When used for battery assembly, it can improve the sealing performance of the battery and improve the performance of the battery.
  • the first embodiment of the present application provides a battery case
  • the battery case includes: a casing 10, a first cover 110, a first insulator 120, and a second cover 130, wherein:
  • the housing 10 includes a bottom wall 140 and a side wall 150 connected to the bottom wall 140; the first cover 110 includes a first surface and a second surface that are opposed to each other, and the second cover 130 includes a third surface and a fourth surface that are opposed to each other.
  • the first surface of the first cover 110 is connected to the end of the side wall 150 away from the bottom wall 140, and the second surface of the first cover 110 is connected to the third surface of the second cover 130 through the first insulator 120,
  • the first cover 110 is provided with a first through hole, and the first insulating member 120 is provided with a second through hole corresponding to the first through hole.
  • first surface is the surface of the first cover 110 facing the bottom wall 140
  • second surface is the surface of the first cover 110 facing away from the bottom wall 140
  • third surface is the second cover 130 facing the bottom wall 140
  • fourth side is the side of the second cover 130 facing away from the bottom wall 140.
  • the first insulating member 120 may be a rubber ring, or an insulating rubber ring or a connecting member made of other insulating materials; the housing 10, the first cover 110, and the second cover 130 are all metal conductive materials, such as Aluminum-manganese alloys, etc. are not limited here.
  • the battery case can be used for battery assembly.
  • the housing 10 includes a bottom wall 140 and a side wall 150 connected to the bottom wall 140.
  • the second surface of the first cover 110 passes through the first insulator 120 and the second cover 130.
  • the first cover 110 is provided with a first through hole
  • the first insulating member 120 is provided with a second through hole corresponding to the first through hole.
  • the battery cell 20 The tabs may protrude from the first through hole of the first cover 110 and the second through hole of the first insulating member 120 in sequence, and are connected to the third surface of the second cover 130.
  • the structure of the first cover 110, the first insulator 120, and the second cover 130 can improve the overall sealing of the battery housing; on the other hand, a tab of the battery core 20 can be connected to the first cover 110
  • another tab can protrude from the first through hole of the first cover 110 and the second through hole of the first insulating member 120 in sequence, and is connected to the third surface of the second cover 130, because the second cover
  • the body 130 and the first cover 110 are insulated and isolated by the first insulating member 120, which can ensure the insulation between the two tabs of the battery core 20 to prevent short circuit of the positive and negative electrodes.
  • the battery housing includes: a housing 10, a first cover 110, a first insulator 120, and a second cover 130.
  • the housing 10 includes a bottom wall 140 and a side connected to the bottom wall 140.
  • Wall 150; the first cover 110 includes a first surface and a second surface that are opposed to each other, and the second cover 130 includes a third surface and a fourth surface that are opposed to each other.
  • the first surface of the first cover 110 is connected to the side wall 150 at one end away from the bottom wall 140, the second surface of the first cover 110 is connected to the third surface of the second cover 130 through the first insulating member 120, the first cover 110 is provided with a first through hole, and the first insulating
  • the member 120 is provided with a second through hole corresponding to the first through hole.
  • the bottom wall 140 is a conical surface or a spherical surface.
  • the bottom wall 140 is a conical surface or a spherical surface.
  • the inner space of the tapered or spherical bottom wall is higher in the thickness direction, so that when the battery case is used for battery assembly, the space occupied by the thickness of the tab is excluded , There is more space to accommodate battery electrolyte, increase the amount of electrolyte, and improve battery performance.
  • the height of the conical surface or the spherical surface is greater than or equal to 0.05 mm.
  • the height of the conical or spherical surface of the bottom wall 140 is greater than or equal to 0.05 mm, which is relative to the overall size of the battery case.
  • the space has increased to a certain ratio in the thickness direction. When it is used for battery assembly, the space that can contain the battery electrolyte is further increased, the amount of electrolyte retained is further increased, and the battery performance is further improved.
  • the battery housing is provided with at least one explosion-proof groove 160 in at least one of the following positions:
  • the fifth surface is the side of the bottom wall 140 facing outward;
  • the sixth surface of the side wall 150 of the housing 10 is the side of the side wall 150 facing outward;
  • At least one explosion-proof groove 160 may be provided on the battery casing.
  • the explosion-proof groove 160 may be opened on the bottom wall 140 of the housing 10 facing outward, or may be opened on the side wall 150 of the housing 10 facing outward. It can also be opened on the fourth side of the second cover 130, that is, the side facing away from the housing 10.
  • At least one explosion-proof groove 160 may be in-line, which is one of the common groove shapes; the explosion-proof groove 160 may also be set as a cross or a cross formed by two in-line grooves. Other shapes are not limited here.
  • An explosion-proof groove 160 is provided on the battery casing, which can relieve the pressure of the high-pressure gas inside the battery casing on the casing 10, and prevent the casing 10 from cracking or even exploding due to excessive pressure inside the casing 10, which endangers safety.
  • the length of the at least one explosion-proof groove 160 is 0.2 to 0.8 times the diameter of the bottom wall 140, and the length of the at least one explosion-proof groove 160 The width is 0.2 to 0.8 times the diameter of the bottom wall 140, and the depth of at least one explosion-proof groove 160 is 0.2 to 0.8 times the thickness of the bottom wall 140.
  • the length and width of the explosion-proof groove 160 can be limited to 0.2 to 0.8 times the diameter of the bottom wall 140, which is too short. Can not play the role of stamping, too long will affect the overall stability of the battery shell, when there is too much air pressure inside, it will easily cause the battery shell to crack, which is counterproductive;
  • the explosion-proof tank 160 cannot be a through tank, otherwise the electrolyte will leak out and safety will be endangered.
  • the depth of the explosion-proof groove 160 is 0.2 to 0.8 times the thickness of the bottom wall 140. If it is too shallow, it will not play the role of stamping. If it is too deep, it will affect the overall stability of the battery shell. , The explosion-proof groove 160 is easily broken, which is counterproductive.
  • the at least one explosion-proof groove 160 extends along the thickness direction of the housing 10; the length of the at least one explosion-proof groove 160 is equal to that of the housing 10
  • the thickness of the body 10 is 0.2 to 0.8 times, the width of at least one explosion-proof groove 160 is 0.003 to 0.2 times the circumference of the side wall 150, and the depth of at least one explosion-proof groove 160 is 0.2 to 0.8 times the thickness of the side wall 150.
  • the explosion-proof groove 160 when at least one explosion-proof groove 160 is opened on the sixth surface of the side wall 150 of the housing 10, the explosion-proof groove 160 extends along the thickness direction of the housing 10, and the extension direction of the explosion-proof groove 160 is the same as that of the first cover. 110 and the second cover 130 are perpendicular to each other.
  • the length of the explosion-proof groove 160 is limited to 0.2 to 0.8 times the thickness of the housing 10
  • the width of the explosion-proof groove 160 is limited to 0.003 to 0.2 times the circumference of the side wall 150.
  • the depth of the groove 160 is limited to 0.2 to 0.8 times the thickness of the side wall 150. While making the explosion-proof groove 160 play a stamping role, it also ensures the overall stability of the battery casing. To avoid repetition, it will not be repeated here.
  • the length of the at least one explosion-proof groove 160 is 0.2 to 0.8 times the diameter of the second cover 130, and the length of the at least one explosion-proof groove 160
  • the width is 0.2 to 0.8 times the diameter of the second cover 130, and the depth of at least one explosion-proof groove 160 is 0.2 to 0.8 times the thickness of the second cover 130.
  • the length of the explosion-proof groove 160 is limited to 0.2 to 0.8 times the diameter of the second cover 130, and the width of the explosion-proof groove 160 is limited to 0.2 to 0.8 times the diameter of the second cover 130 , The depth of the explosion-proof groove 160 is limited to 0.2 to 0.8 times the thickness of the second cover 130. While the explosion-proof groove 160 plays a stamping role, the overall stability of the battery case is ensured. To avoid repetition, it will not be repeated here. Go into details.
  • the housing 10 and the first cover 110 are welded or welded.
  • the housing 10 and the first cover 110 can be laser welded, electrically welded, or heat-sealed and welded, which is not limited here. Welding or welding the casing 10 and the first cover 110 can further improve the sealing performance of the battery casing when the battery casing is used for battery assembly, prevent electrolyte leakage, and further improve the performance of the battery.
  • first cover 110 and the first insulating member 120 are connected by welding, welding or injection molding; the second cover 130 and the first insulating member 120 are connected by welding, welding or injection molding.
  • the first cover 110 and the first insulating member 120 can be laser welded, or electrically welded, and can also be heat-sealed and welded or connected by injection molding; similarly, the second cover 130 and the first insulating member 120 It can be laser welded, electric welded, heat-sealed welding or injection-molded connection, which is not limited here. In this way, when the battery case is used for battery assembly, the hermeticity of the battery case can be further improved, electrolyte leakage can be prevented, and the performance of the battery can be further improved.
  • the battery housing provided by this embodiment includes: a housing 10, a first cover 110, a first insulator 120, and a second cover 130.
  • the housing 10 includes a bottom wall 140 and a bottom wall 140 connected to the bottom.
  • the side wall 150 of the wall 140, the bottom wall 140 is a conical surface or a spherical surface;
  • the first cover 110 includes a first surface and a second surface that are opposed to each other, and the second cover 130 includes a third surface and a fourth surface that are opposed to each other,
  • the first surface of the first cover 110 is connected to the end of the side wall 150 away from the bottom wall 140, and the second surface of the first cover 110 is connected to the third surface of the second cover 130 through the first insulator 120.
  • the cover 110 is provided with a first through hole, and the first insulating member 120 is provided with a second through hole corresponding to the first through hole.
  • the sealing performance is better. Therefore, the structure of connecting the second cover 130 through the first insulator 120 outside the first cover 110 makes the battery case more tightly sealed. When the battery case is used for battery assembly, the battery tightness can be improved. Improve battery performance
  • this embodiment also provides a battery.
  • the battery includes the battery casing provided in the embodiment shown in FIGS. 1 to 4, and a battery cell 20 housed in the battery casing.
  • the first tab 210 is connected to the first cover 110, and the second tab 220 of the battery core 20 is connected to the second cover 130.
  • the second tab 220 of the cell 20 when the first tab 210 of the cell 20 is a positive tab, the second tab 220 of the cell 20 is a negative tab, and when the first tab 210 of the cell 20 is a negative tab, The second tab 220 of the cell 20 is the positive tab.
  • the first tab 210 of the cell 20 is the positive tab, and the second tab 220 is the negative tab.
  • the battery casing provided in the above embodiment is used to encapsulate the battery, and the structure in which the casing 10, the first cover 110, the first insulator 120, and the second cover 130 are connected in sequence can improve the overall sealing of the battery.
  • the first tab 210 of the positive electrode of the battery cell 20 can be connected to the first cover 110
  • the second tab 220 of the negative electrode can be connected to the second cover 130, because the first cover 110 and the second cover
  • the second embodiment of the present application provides a battery case for wrapping the outer side of the battery core 20, including a casing 10, and the battery core 20 of the battery can be placed in the casing 10.
  • the housing 10 includes a bottom wall 140 and an annular side wall 150, and the bottom end of the side wall 150 is connected to the bottom wall 140; the top end of the side wall 150 has an opening.
  • the bottom end of the side wall 150 and the bottom wall 140 may be connected together by welding, welding, bonding, or integral molding, etc., which is not limited.
  • the battery core 20 includes a first tab (not shown) and a second tab 220, where the first tab can be a positive tab, and the second tab 220 can be a negative tab; alternatively, the first tab can be The negative ear, and the second ear 220 may be a positive ear.
  • first cover 110 a first insulating member 120 and a second cover 130.
  • first cover 110, the first insulator 120 and the second cover 130 together form a shell cover, one end surface of the shell cover is connected with the open end of the casing 10, and the bottom end surface of the first cover 110 is connected to the casing The open ends of 10 are connected.
  • the battery core 20 can be sealed in the accommodating cavity formed by the shell cover and the housing 10.
  • the second cover 130 may be electrically connected to the second tab 220.
  • the first cover 110 may be electrically connected with the first tab (not shown); or, the first cover 110 may be electrically connected with the first tab through the housing 10.
  • the first tab may be connected with the inner wall of the bottom wall 140.
  • the first cover 110 may be a metal ring
  • the first insulating member 120 may be an insulating ring
  • the second cover 130 may be a metal sheet.
  • housing 10 and the housing cover can be connected together by welding, welding or bonding, which is not limited.
  • the first insulating member 120 is located on the side of the first cover 110 away from the bottom wall 140 of the housing 10, and the second cover 130 is located on the side of the first insulating member 120 away from the first cover 110. side. In other words, the first insulating member 120 is located between the first cover 110 and the second cover 130.
  • the central hole surrounded by the inner edge of the first insulating member 120 is the second through hole 121.
  • the first insulating member 120 can avoid the short circuit caused by the contact between the first cover 110 and the second cover 130.
  • the first cover The body 110 and the second cover 130 are hermetically connected together by the first insulating member 120.
  • first insulating member 120 may be a sealing ring, a rubber ring, etc. made of polypropylene material, or an insulating rubber ring or a connecting member made of other insulating materials, which is not limited.
  • annular groove 133 is provided on the end surface of the second cover 130 facing the first cover 110, and the annular groove 133 is located in an area directly opposite to the second through hole 121.
  • the second cover 130 is provided with a convex edge on one end surface facing the first cover 110, that is, the annular groove 133 can be replaced with a convex edge.
  • the rib is located in the area directly opposite to the second through hole 121.
  • the outer edge of the annular groove 133 or the rib may be arranged close to the inner edge of the first insulating member 120. At this time, as long as the annular groove 133 or the rib can be observed by the detection equipment , It can be considered that the first insulating member 120 and the second cover 130 are aligned. It can be seen that the alignment between the first insulator 120 and the second cover 130 allows certain process errors.
  • the inner edge of the first insulating member 120 covers a ring-shaped dispensing layer, and the inner edge of the first insulating member 120 and the second cover 130 and the first cover 110 are sealed by the dispensing layer.
  • the inner edge of the first insulating member 120 is sealed between the second cover 130 and the inner edge of the first cover 110 by the dispensing layer.
  • the dispensing layer can also prevent the first insulating member 120 from contacting the electrolyte in the battery and causing corrosion.
  • the glue layer can be formed by glue dispensing.
  • the glue is dispensed on the inner edge of the first insulating member 120. Since the glue has fluidity, the glue easily flows from the glue point to the center of the second cover 130 during glue dispensing.
  • the annular groove 133 is located in the area between the inner edge of the first insulator 120 and the center of the second cover 130. Therefore, when the glue flows toward the center of the second cover 130, it will enter the annular groove 133. Ability to prevent the glue from continuing to flow toward the center of the second cover 130. The glue cannot flow to the area between the annular groove 133 and the center of the second cover 130, which can be electrically connected to the tabs normally.
  • the rib is located in the area between the inner edge of the first insulating member 120 and the center of the second cover 130. Therefore, when the glue flows toward the center of the second cover 130, it will be blocked by the rib, thereby preventing the glue from continuing to the second cover. The center of the body 130 flows. The glue cannot flow to the area between the rib and the center of the second cover 130, and this area can be electrically connected to the tabs normally.
  • cross-sectional shape of the annular groove 133 or the rib may be rectangular, arc, triangle, semicircle, etc., and there is no limitation on this.
  • the annular groove 133 or the rib may be a circular ring, that is, the shape formed by the annular groove 133 or the rib may be a circle.
  • the shape enclosed by the annular groove 133 or the convex ribs may also be rectangular, triangular, polygonal, or star-shaped, and there is no limitation on this.
  • the battery case provided in this embodiment includes: a housing 10, a first cover 110, a first insulating member 120, and a second cover 130.
  • One end of the housing 10 is provided with an opening, and one side of the first cover 110 The end surface is connected to the open end surface of the housing 10, the first insulating member 120 is located on the side of the first cover 110 away from the housing 10, and the second cover 130 is located on the side of the first insulating member 120 away from the first cover 110;
  • the first cover 110, the first insulator 120, and the second cover 130 together form a shell cover.
  • One end surface of the shell cover is connected with the open end surface of the casing 10, and the battery core 20 can be sealed between the casing cover and the casing 10. In the accommodating cavity formed.
  • the central hole surrounded by the inner edge of the first insulating member 120 is the second through hole 121, and the second cover 130 is provided with an annular groove 133 or convex edge on one end surface facing the first cover 110, and the annular groove 133 or convex The rib is located in the area directly opposite to the second through hole 121.
  • the relative position of the annular groove 133 or the ribs and the inner edge of the first insulating member 120 can be used to determine the second cover.
  • the battery case provided in this embodiment solves the problem that when the second cover 130 is viewed from the center hole enclosed by the inner edge of the first insulating member 120, it faces the center enclosed by the inner edge of the first insulating member 120.
  • the surface of the second cover 130 of the hole is flat and smooth, with almost no difference. It is impossible to determine the relative position of the second cover 130 and the first insulating member 120, so that it is impossible to determine whether the first insulating member 120 and the second cover 130 are aligned.
  • the central hole surrounded by the inner edge of the first cover 110 is the first through hole 111, and the second through hole 121 at least partially overlaps the first through hole 111.
  • the second tab 220 can extend from the housing 10 at the overlapping portion of the second through hole 121 and the first through hole 111 to be connected to the second cover 130. In other words, the second tab 220 may protrude from the first through hole 111 and the second through hole 121 in sequence, and is electrically connected to the side of the second cover 130 facing the housing 10.
  • the relative positional relationship between the first through hole 111 and the shape of the area enclosed by the annular groove 133 can be used as a quality inspection parameter for the alignment of the shell cover after the manufacture is completed.
  • the shape of the second through hole 121 and the first through hole 111 may be rectangular, circular or other shapes, and there is no limitation on this.
  • the first cover 110 and the second cover 130 can be heated and pressurized. Under high pressure, the first insulating member 120 sandwiched between the first cover 110 and the second cover 130 will partially overflow the glue at the junction of the first cover 110 and the second cover 130, and part of it will overflow from the first cover 110 and the second cover 130. The inner edge of an insulating member 120 overflows to the junction of the first insulating member 120, the inner edge of the first cover 110, and the second cover 130, so that the overflowing glue can further affect the first cover 110 and the second cover.
  • the sealing and bonding between the bodies 130 improves the reliability of the connection and sealing of the first insulator 120 to the first cover 110 and the second cover 130.
  • annular groove 133 or rib can prevent the overflowing glue from continuing to flow toward the center of the second cover 130 , To prevent the overflow of glue from affecting the connection between the second cover 130 and the tabs.
  • the second cover 130 is used for soldering with the second tab 220 of the battery core 20 to form a second solder joint 221.
  • the solder joint 221 is directly opposite to the area surrounded by the inner edge of the annular groove 133 or the raised rib. Since the formed second solder joint 221 is located in the area enclosed by the annular groove 133 and the inner edge of the protruding rib, it is avoided that glue dispensing or overflow may affect the connection between the second solder joint 221 and the second tab 220.
  • the second welding point 221 and the second tab 220 can be connected by laser welding.
  • the projection of the inner edge of the first cover 110 on the bottom wall 140 is located within the projection of the first insulating member 120 on the bottom wall 140.
  • the inner edge of the first insulating member 120 exceeds the inner edge of the first cover 110, which can prevent the inner edge of the first cover 110 from contacting the second cover 130, thereby achieving the effect of insulation protection.
  • the outer diameter of the first insulating member 120 is greater than or equal to the outer diameter of the first cover 110.
  • the outer edge of the first insulating member 120 exceeds the outer edge of the first cover body 110, which can prevent the outer edge of the first cover body 110 from contacting the outer edge of the second cover body 130, thereby achieving the effect of insulation protection.
  • the outer diameter of the first insulating member 120 is greater than or equal to the outer diameter of the second cover 130.
  • the outer edge of the first insulating member 120 exceeds the outer edge of the second cover body 130, which can prevent the outer edge of the second cover body 130 from contacting the outer edge of the first cover body 110, thereby achieving the effect of insulation protection.
  • the outer diameter of the first insulating member 120 is greater than or equal to the outer diameters of the first cover 110 and the second cover 130 at the same time.
  • the outer edge of the first insulator 120 exceeds the outer edges of the first cover 110 and the second cover 130, which can prevent the outer edge of the second cover 130 from contacting the outer edge of the first cover 110, thereby providing insulation protection Effect.
  • the distance between the annular groove 133 or the rib and the center of the second cover 130 is greater than or equal to 2 mm and less than or equal to 14 mm.
  • the distance between the wall surface of the annular groove 133 or the rib on the side close to the center of the second cover 130 and the center of the second cover 130 is greater than or equal to 2 mm and less than or equal to 14 mm. In this way, the appearance size of the button battery is satisfied.
  • the width of the annular groove 133 or the rib is greater than or equal to 0.05 mm and less than or equal to 2 mm; the depth of the annular groove 133 or the height of the rib is greater than or equal to 0.02 mm and less than or equal to 0.4 mm. In this way, it is easy to visually locate, has the ability to hold glue, and also satisfies the appearance size of the button battery.
  • the outer diameter of the first cover 110 is greater than or equal to 8 mm and less than or equal to 16 mm; the distance from the inner edge of the first cover 110 to the center of the first cover 110 is greater than or equal to 3 mm and less than or equal to 14 mm; The thickness of 110 is greater than or equal to 0.05 mm and less than or equal to 0.5 mm. In this way, the appearance size of the button battery is satisfied.
  • the outer diameter of the first insulating member 120 is greater than or equal to 8 mm and less than or equal to 16 mm; the distance from the inner edge of the first insulating member 120 to the center of the first insulating member 120 is greater than or equal to 2 mm and less than or equal to 14 mm; The thickness of 120 is greater than or equal to 0.05 mm and less than or equal to 0.5 mm. In this way, while achieving insulation and sealing, it satisfies the appearance size of the button battery.
  • the diameter of the second cover 130 is greater than or equal to 6 mm and less than or equal to 16 mm; the thickness of the second cover 130 is greater than or equal to 0.05 mm and less than or equal to 0.5 mm. In this way, the appearance size of the button battery is satisfied.
  • the first cover 110, the first insulator 120, and the second cover 130 are sequentially attached to form the cover, and the cover is heated and pressurized and sealed by dispensing. Since the housing 10 and the cover formed by the first cover 110, the first insulating member 120, and the second cover 130 can be connected together by welding, welding, etc., the sealing performance is better. Therefore, the structure of connecting the second cover 130 through the first insulating member 120 outside the first cover 110 makes the battery case more tightly sealed. When the battery case is used for battery assembly, the battery tightness can be improved. Improve battery performance.
  • Glue can flow into the annular groove 133 from the seal.
  • the annular groove 133 prevents the glue from continuing to flow toward the center of the second cover 130;
  • the connection of the ear 220 and the second cover 130 is affected.
  • One end surface of the shell cover is connected with the open end surface of the shell 10, and the battery core 20 can be sealed in the containing cavity formed by the shell cover and the shell 10.
  • this embodiment also provides a battery, which includes at least the battery core 20 and the battery casing in the above-mentioned embodiment, and the battery casing is wrapped around the battery core 20.
  • the cell 20 may be a wound cell.
  • the wound cell includes a first pole piece, a second pole piece, and a diaphragm separating the first pole piece and the second pole piece; the first pole piece is provided There is a first tab (not shown), the first tab can be set on the first pole piece by welding, the second tab is provided with a second tab 220, and the second tab 220 can be set by welding On the second pole piece; during the winding process, the first pole piece, the second pole piece and the diaphragm are wound layer by layer in the same direction from the winding head end and finally form a wound cell.
  • the first pole piece is a positive pole piece
  • the second pole piece is a negative pole piece
  • the first pole piece is a positive pole lug
  • the second pole piece 220 is a negative pole piece
  • the first pole piece pole piece is In the case of a negative electrode sheet
  • the second electrode sheet is a positive electrode sheet
  • the first electrode lug is a negative electrode lug
  • the second electrode lug 220 is a positive electrode lug
  • the first cover 110, the first insulator 120, and the second cover 130 are successively attached to form a shell cover, and the shell cover is heated and pressurized and sealed with glue.
  • the glue can flow into the ring from the seal.
  • the groove 133 and the annular groove 133 prevent the glue from continuing to flow toward the center of the second cover 130; or when the glue flows to the center of the second cover 130, it is blocked by the ribs, thereby preventing the glue from affecting the second tab 220 and the second cover 130 connection impact.
  • the relative position of the annular groove 133 or the ribs and the inner edge of the first insulating member 120 can be used to determine the second cover.
  • One end surface of the casing cover is connected with the open end surface of the casing 10, and the wound cell can be sealed in the accommodating cavity formed by the casing cover and the casing 10.
  • the bottom wall 140 of the housing 10 is electrically connected to the first tab, and the second cover 130 is electrically connected to the second tab 220 to form the positive and negative electrodes of the battery, respectively. Since the housing 10 and the cover formed by the first cover 110, the first insulating member 120, and the second cover 130 can be connected together by welding, welding, etc., the sealing performance is better. Therefore, the structure of connecting the second cover 130 through the first insulating member 120 outside the first cover 110 makes the battery case more tightly sealed. When the battery case is used for battery assembly, the battery tightness can be improved. Improve battery performance.
  • the side of the casing 10 away from the first cover 110 is connected to the positive or negative electrode of the electronic device, and the second cover 130 is connected to the negative or positive electrode of the electronic device. , So that the battery powers the electronic device.
  • the battery provided by the third embodiment of the present application includes: an encapsulation shell 1, a battery cell 20, and a second cover 130.
  • the encapsulation shell 1 is provided with a accommodating cavity for accommodating the battery core 20.
  • the packaging shell 1 is provided with a hole communicating with the accommodating cavity, the second cover 130 covers the hole, and a first insulator 120 and a second cover 130 are provided between the second cover 130 and the packaging shell 1 It is insulated and hermetically connected to the packaging shell through the first insulating member 120 to achieve the purpose of insulation and sealing between the second cover 130 and the packaging shell 1.
  • the first insulating member 120 may be an insulating member made of polypropylene material.
  • the second cover 130 may be a conductive member, and the first insulating member 120 may be a sealing rubber ring.
  • the packaging shell 1 includes a shell 10 and a first cover 110.
  • the shell 10 is provided with a groove extending toward the bottom wall 140 of the shell 10.
  • the first cover 110 is sealed on the accommodating cavity, so that the housing 10 and the first cover 110 are enclosed to form a packaging shell 1 having a closed accommodating cavity, wherein
  • the first cover 110 and the casing 10 are connected in a sealed manner, for example, the first cover 110 and the casing 10 are connected by welding, bonding, or the like.
  • a hole communicating with the accommodating cavity is provided on the first cover 110, the second cover 130 is sealed at the hole, and the second cover 130 and the first cover 110 are insulated by the first insulating member 120 And sealed connection.
  • the edge of the hole is surrounded to form a first through hole.
  • the first insulating member 120 may be ring-shaped.
  • the second cover 130 and the first cover 110 can be connected to each other. 110 is heated and pressurized, so that under high temperature and high pressure, the first insulating member 120 sandwiched between the second cover 130 and the first cover 110 will partially overflow the second cover 130 and the first cover 110 Part of the overflow glue at the joint overflows from the outer edge of the first insulating member 120 to the junction of the second cover 130 and the first lid 110, and another part overflows from the inner edge of the first insulating member 120 to the first insulating member 120 and The edge joints of the holes of the first cover 110, so that the overflowing glue can further seal and bond the second cover 130 and the first cover 110, which improves the connection between the first insulating member 120 and the second cover.
  • the connection between the cover 130 and the first cover 110 is reliable.
  • the second cover 130 is provided with a protruding portion 131 protruding toward the accommodating cavity, and an annular first overflow groove 30 is formed between the protruding portion 131 and the edge of the hole.
  • a glue overflow groove 30 has a width of 0.1-3 mm along the radial direction of the battery core 20, so that while accommodating the overflowing glue, it can also meet the external dimensions of the battery.
  • the first cover 110 is further provided with a accommodating groove
  • the second cover 130 is located in the accommodating groove
  • the outer edge of the second cover 130 is connected to the side groove of the accommodating groove
  • a second glue overflow groove 40 is formed between the walls.
  • the glue overflowing from the outer edge of the first insulating member 120 can be located in the second glue overflow groove 40.
  • the glue in the second glue overflow groove 40 can further enhance the second cover 130.
  • the sealing performance with the first cover 110 further improves the overall sealing performance of the battery, and the overflowing glue is located in the second glue overflow groove 40.
  • the width of the two overflow glue groove 40 along the radial direction of the battery core 20 is set to be between 0.1 mm and 3 mm. In this way, while ensuring that the overflow glue is accommodated, the external dimensions of the battery can be satisfied.
  • a sealant can also be arranged in the second glue overflow groove 40, and the second cover 130 and the packaging shell can be sealed by the sealant. 1 to improve the sealing of the battery, where the sealant can be a glue formed by mixing one of acrylic, epoxy, and polyurethane with a hardener, or a sealant made of other sealing materials. Therefore, this embodiment does not impose a limitation.
  • the cell 20 is a wound cell.
  • the wound cell includes a first pole piece, a second pole piece, and the first pole piece and the second pole piece separating the first pole piece and the second pole piece. Open the diaphragm; the first pole piece is provided with a first lug 210, the first lug 210 can be set on the first pole piece by welding, the second pole piece is provided with a second lug 220, a second lug 220 It can be set on the second pole piece by welding; during the winding process, the first pole piece, the second pole piece and the diaphragm are wound layer by layer in the same direction from the winding head end and finally form a wound cell, at the same time , A cavity 230 coaxial with the battery core 20 is formed at the axis of the battery core 20.
  • the first pole piece of the battery cell 20 may be a positive pole piece, and the second pole piece may be a negative pole piece.
  • the first pole piece 210 provided on the first pole piece is a positive pole piece
  • the second pole piece is provided on the second pole piece.
  • the tab 220 is a negative tab.
  • the battery cell 20 is accommodated in the accommodating cavity, and the positive tab is electrically connected to the inner wall of the bottom wall 140 of the casing 10 by welding so that the casing 10 is formed as a battery.
  • the positive and negative lugs are electrically connected to the second cover 130 so that the second cover 130 is formed as the negative electrode of the battery.
  • the casing 10 is connected to the positive electrode of the electronic device and the second cover
  • the body 130 is electrically connected to the negative electrode of the electronic device, so that the battery core 20 supplies power to the electronic device.
  • the first pole piece of the battery cell 20 may be a negative pole piece, and the second pole piece may be a positive pole piece.
  • the first pole piece 210 provided on the first pole piece is a negative pole piece
  • the second pole piece is placed on the second pole piece.
  • the second tab 220 is a positive tab.
  • the battery cell 20 is contained in the accommodating cavity, and the negative tab is electrically connected to the housing 10 by welding so that the case 10 is formed as the negative electrode of the battery. It is electrically connected to the second cover 130 so that the second cover 130 is formed as the positive electrode of the battery.
  • the housing 10 is connected to the negative electrode of the electronic device, and the second cover 130 is connected to the negative electrode of the electronic device.
  • the positive connection of the electronic device is turned on, so that the battery core 20 supplies power to the electronic device.
  • the battery core 20 is first placed in the accommodating cavity, and then the first tab 210 on the battery core 20 and the inner wall of the bottom wall 140 of the housing 10 are electrically connected by welding or the like
  • a cylindrical thimble is inserted into the cavity 230 of the battery core 20, and the first tab is inserted through the thimble.
  • 210 abuts against the inner wall of the bottom wall 140 of the casing 10, and then the first tab 210 and the inner wall of the bottom wall 140 of the casing 10 are welded.
  • a concave welding mark is provided on the surface of the first tab 210 facing the battery core 20, and the welding device welds the first tab 210 and the housing 10 at the welding mark.
  • the weld mark can be one, and when laser welding is used, the weld mark can be four.
  • the depth of the weld mark can be between 20 and 200 ⁇ m.
  • the height of the first solder joint formed after soldering can be between 10 and 120 ⁇ m, and the first solder joint after soldering can be formed as one or more individual solder joints, or one formed by multiple solder joints. Straight line, this embodiment does not limit this.
  • a first insulating glue layer 50 is provided between the lower end surface of the battery core 20 and the inner wall of the bottom wall 140 of the housing 10 to prevent electrical conduction between the battery core 20 and the housing 10.
  • a second insulating glue layer 60 is provided between the first cover 110 to prevent the electric core 20 and the first cover 110 from conducting electricity. Therefore, in order to facilitate the insertion of the thimble into the cavity 230 of the battery 20 to resist the first The lug 210, and the welding equipment to facilitate the welding of the first lug 210 and the housing 10.
  • a third through hole 501 coaxial with the cavity 230 is provided on the first insulating adhesive layer 50, wherein The solder mark on the first tab 210 should be in the area corresponding to the third through hole 501 and the cavity 230, that is, by providing the third through hole 501 on the first insulating adhesive layer 50, so that the first An insulating glue layer 50 does not block the welding mark on the first tab 210, so that the welding equipment can weld the first tab 210 and the housing 10, and there is no need to provide a welding mark on the outside of the bottom wall 140 of the housing 10 , That is, the outer side of the bottom wall 140 of the housing 10 is a smooth plane or arc surface.
  • the welding mark is arranged on the outer side of the bottom wall 140 of the housing 10, some external strong corrosive substances will pass through the bottom wall 140 of the housing 10
  • the welding mark on the outer side corrodes the battery, resulting in low safety and reliability of the battery. Therefore, in this embodiment, the welding mark is arranged on the surface of the first tab 210 facing the battery cell to avoid corrosion by external strong corrosives. Welding, thereby improving the safety and reliability of the battery.
  • a fourth through hole 601 coaxial with the cavity 230 is provided on the second insulating adhesive layer 60, so that the thimble can pass through the third through hole 501 and the fourth through hole 601 and abut the cavity 230
  • the first tab 210 and the housing 10 are welded by welding equipment, thereby improving the reliability of the connection between the first tab 210 and the inner wall of the bottom wall 140 of the housing 10, and simplifying the installation of the battery.
  • the difficulty of assembly improves the safety and reliability of the battery core 20.
  • the diameter of the third through hole 501 may be greater than the diameter of the cavity 230
  • the diameter of the fourth through hole 601 may be greater than the diameter of the cavity 230, so that the third The edges of the through hole 501 and the fourth through hole 601 do not interfere with the insertion of the thimble.
  • the third through hole 501 The hole diameter is 0-0.5mm larger than the diameter of the cavity 230, and the hole diameter of the fourth through hole 601 is 0-0.5mm larger than the diameter of the cavity 230, that is, under ideal conditions, the third through hole 501 and the fourth through hole
  • the diameters of 601 and the cavity 230 are the same, and when there are manufacturing errors, in order to prevent the first insulating glue layer 50 and the second insulating glue layer 60 from interfering when the thimble is inserted into the cavity 230, the third through hole 501 and The diameter of the fourth through hole 601 may be larger than the diameter of the cavity 230, as long as it is ensured that the battery core 20 is insulated from the lower end surface and the housing 10, and the upper end surface of the battery core 20 is insulated from the first
  • a third insulating glue layer 70 is provided between the second tab 220 and the first cover 110.
  • the third insulating glue layer 70 insulates the first cover 110 and the second tab 220 to improve the second pole.
  • the electrical connection between the ear 220 and the second cover 130 is reliable.
  • the third insulating glue layer 70 is a torus, and the third insulating glue layer 70 is attached to the inner wall of the first cover 110 and covers the second tab 220 and the first cover. 110 corresponds to the position.
  • the outer edge of the third insulating glue layer 70 is smaller than the first The outer edge of the cover 110.
  • the third insulating adhesive layer 70 is further provided with a fifth through hole 701, the fifth through hole 701 is coaxial with the cavity 230, in order to prevent the first cover 110 and the second tab 220 from being electrically connected, therefore
  • the aperture of the fifth through hole 701 is smaller than the size of the hole on the first cover 110 in the radial direction, so that electrical connection between the second tab 220 and the first cover 110 can be avoided, and The second tab 220 may partially pass through the fifth through hole 701 to be electrically connected to the second cover 130.
  • the outer edge of the third insulating glue layer 70 is smaller than the edge size of the first cover 110 by 0.05-2 mm, and the aperture of the fifth through hole 701 is smaller than that of the first cover 110.
  • the size of the hole 110 in the radial direction is smaller by 0-2 mm, so that the reliability of the connection between the second tab 220 and the second cover 130 is improved.
  • the third insulating glue layer 70 can also be attached to the side of the second lug 220 close to the first cover 110 to form the protective glue for the second lug 220 along the battery core.
  • the distance between the edge of the third insulating glue layer 70 on the second tab 220 and the axis of the battery core 20 is smaller than the distance between the hole on the first cover 110 and the axis of the battery core 20, that is to say .
  • the protective glue on the second tab 220 extends along the radial direction of the battery core 20 toward the axis of the battery core 20, and the edge of the protective glue on the second tab 220 exceeds the edge of the hole on the first cover 110, In this way, it can be ensured that the second tab 220 is not electrically connected to the first cover 110, thereby improving the reliability of the connection between the second tab 220 and the second cover 130.
  • the first The insulating adhesive layer 50 is trimmed, so that part of the edge of the first insulating adhesive layer 50 can be formed into a linear trim.
  • the trimming on the first insulating adhesive layer 50 is The cut edge 502 describes that along the axial direction of the battery core 20, the first cut edge 502 is flush with the first tab 210, which can prevent the first insulating glue layer 50 from connecting the first tab 210 to the pole piece on the battery core 20 Intervene at the time.
  • edge trimming is also performed on the second insulating glue layer 60, so that part of the edge of the second insulating glue layer 60 A straight edge is formed.
  • the edge on the second insulating adhesive layer 60 is described by the second edge 602.
  • the second edge 602 is connected to the second pole.
  • the ears 220 are flush, which can prevent the second insulating glue layer 60 from interfering when the second electrode ears 220 are connected to the pole pieces on the battery core 20, thereby improving the working reliability of the battery.
  • the second cover 130 is also provided with a liquid injection port 132.
  • the first tab 210 on the battery cell 20 is electrically connected to the inner wall of the bottom wall 140 of the housing 10
  • the electrolyte is injected into the accommodating cavity from the liquid injection port 132 on the second cover 130.
  • the electrolyte is injected, it is sealed with a sealing nail 80 Cover the liquid injection port 132 and seal it.
  • a groove for accommodating the sealing nail 80 can be provided on the second cover 130, and the depth of the groove can be equal to the thickness of the sealing nail 80. In this way, the sealing nail 80 is sealed in the injection hole. When the liquid port 132 is on, the sealing nail 80 is flush with the surface of the second cover 130, thereby improving the surface flatness of the battery.
  • the first cover 110 and the second cover 130 are insulated and sealed together by the first insulating member 120 by heating and pressing, and then Put the battery cell 20 into the accommodating cavity of the housing 10, and then seal the first cover 110 with the second cover 130 to the housing 10 by welding, etc., and insert the thimble Inside the cavity 230 of the cell 20, the first end of the thimble abuts on the first tab 210, and the second end of the thimble protrudes out of the first cover 110 to facilitate the user to hold.
  • the lug 210 is attached to the inner wall of the bottom wall 140 of the housing 10, and the first lug 210 and the housing 10 are welded by welding equipment, and the second lug 220 on the battery core 20 and the second cover
  • the body 130 is electrically connected by welding or the like, the thimble is taken out, and the electrolyte is injected into the accommodating cavity from the injection port 132.
  • the sealing nail 80 is sealed on the injection port 132, The sealing nail 80 and the liquid injection port 132 are connected in a sealed manner by bonding or welding, thereby completing the assembly of the battery.
  • the third through hole 501 is provided on the first insulating adhesive layer 50
  • the fourth through hole 601 is provided on the second insulating adhesive layer 60
  • the third through hole 601 is provided on the third insulating adhesive layer 70.
  • the fifth through hole 701 in this way, the thimble can sequentially pass through the fifth through hole 701, the fourth through hole 601, the cavity 230 on the battery core 20, and the third through hole 501 and abut on the first tab 210, The assembly difficulty of the battery is simplified, and the working reliability of the battery is improved.
  • the housing 10 and the housing cover constituted by the first cover 110, the first insulator 120, and the second cover 130 can be connected together by welding, welding, etc., it is sealed The sex is better. Therefore, the structure of connecting the second cover 130 through the first insulator 120 outside the first cover 110 makes the battery case more tightly sealed.
  • the battery tightness can be improved. Improve battery performance.
  • the second cover 130 is provided with a protruding portion 131 protruding toward the accommodating cavity.
  • a first glue overflow groove 30 is formed between the protruding portion 131 and the edge of the hole.
  • the glue overflowing from the first insulating member 120 is accommodated in the first A glue overflow groove 30, in this way, the glue overflowing from the first glue overflow groove 30 can further seal the second cover 130 and the packaging shell 1, thereby improving the sealing performance of the battery.
  • An embodiment of the present application also provides an electronic device, including an electronic device body and the battery provided in Embodiment 1, Embodiment 2, and Embodiment 3.
  • the battery provides electrical energy for the electronic device body.
  • the main body of the electronic device may be a wearable electronic device or other electronic product, or may be a medical electronic device used in medical treatment, etc., which is not limited in this embodiment.
  • the electronic device provided by the embodiment of the present application includes an electronic device body and a battery that provides electrical energy for the electronic device body.
  • the covers can be connected together by welding, welding, etc., and the sealing performance is better. Therefore, the structure of connecting the second cover 130 through the first insulating member 120 outside the first cover 110 makes the battery case more tightly sealed. When the battery case is used for battery assembly, the battery tightness can be improved. Improve battery performance.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

一种电池外壳、电池和电子设备，包括：壳体（10）、第一盖体（110）、第一绝缘件（120）和第二盖体（130），其中：壳体（10）包括底壁（140）和连接于底壁（140）的侧壁（150）；第一盖体（110）包括相对设置的第一面和第二面，第二盖体（130）包括相对设置的第三面和第四面，第一盖体（110）的第一面连接于侧壁（150）远离底壁（140）的一端，第一盖体（110）的第二面通过第一绝缘件（120）与第二盖体（130）的第三面连接，第一盖体（110）开设有第一通孔，第一绝缘件（120）上开设有与第一通孔对应的第二通孔。壳体（10）、第一盖体（110）、第一绝缘件（120）和第二盖体（130）依次连接的结构可以提高电池整体的密封性。因此，上述电池外壳、电池和电子设备解决了壳体（10）、密封环和壳盖之间通过过盈配合制成的电池的密封性较差的技术问题。

Description

电池外壳、电池和电子设备
本申请要求于2020年07月08日提交中国专利局、申请号为202021331670.9、申请名称为“扣式电池及电子设备”的中国专利申请的优先权；2021年2月23日提交中国专利局、申请号为202110201053.X、申请名称为“电池外壳及电池”的中国专利申请的优先权；2020年3月18日提交中国专利局、申请号为202020339309.4、申请名称为“密封壳体结构及电池”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池技术，尤其涉及一种电池外壳、电池和电子设备。
背景技术
纽扣电池也称扣式电池，是指外形尺寸像一颗小纽扣的电池，一般来说其直径较大，厚度较薄。纽扣电池因体形较小，故在各种微型电子产品中得到了广泛的应用，如可穿戴设备：无线耳机，运动手表，手环，戒指等电子产品。由于电池的内部属于密闭空间，因此，密封性对于电池而言极其重要。
目前，扣式电池包括筒状壳体和罩设在筒状壳体外侧的筒状壳盖，壳体的外壁与壳盖的内壁之间环设密封环，为了实现壳体与壳盖之间的密封，三者之间一般是通过过盈配合密封。
然而，壳体、密封环和壳盖之间通过过盈配合制成的电池的密封性较差。
发明内容
本申请提供一种电池外壳、电池和电子设备，解决了壳体、密封环和壳盖之间通过过盈配合制成的电池的密封性较差的技术问题。
本申请第一方面提供一种电池外壳，
包括：壳体、第一盖体、第一绝缘件和第二盖体，其中：
所述壳体包括底壁和连接于所述底壁的侧壁；所述第一盖体包括相对设置的第一面和第二面，所述第二盖体包括相对设置的第三面和第四面，所述第一盖体的所述第一面连接于所述侧壁远离所述底壁的一端，所述第一盖体的所述第二面通过所述第一绝缘件与所述第二盖体的所述第三面连接，所述第一盖体开设有第一通孔，所述第一绝缘件上开设有与所述第一通孔对应的第二通孔。
所述电池外壳用于包裹在电芯外侧，所述第一盖体为金属环，所述第一绝缘件为绝缘环，所述第二盖体为金属片；所述侧壁为环形侧壁，所述侧壁的底端与所述底壁连接，所述侧壁的顶端具有开口；
所述第一盖体底端端面与所述开口端面相连，所述第一盖体的内边缘围设的区域为所述第一通孔，所述第一绝缘件的内边缘围设的区域为所述第二通孔，所述第一通孔与所述第二通孔至少部分重叠；
所述第二盖体朝向所述第一盖体的一侧端面上环设环形槽或凸棱，所述环形槽或凸棱位于所述第二通孔正对的区域。
还包括：第二焊点，所述第二盖体用于与所述电芯的极耳焊接以形成所述第二焊点，所述第二焊点正对所述环形槽或凸棱内边缘围设的区域。
所述第一盖体内边缘在所述底壁上的投影位于所述第一绝缘件在所述底壁上的投影内。
所述第一绝缘件的外径大于等于所述第一盖体的外径；
和/或，所述第一绝缘件的外径大于等于所述第二盖体的外径。
所述环形槽或凸棱与所述第二盖体中心的距离大于等于2mm且小于等于14mm。
所述环形槽或凸棱的宽度大于等于0.05mm且小于等于2mm；
所述环形槽的槽深或所述凸棱的高度大于等于0.02mm且小于等于0.4mm。
所述底壁为锥面或者球面。
所述锥面或者所述球面的高度大于或者等于0.05毫米。
所述电池外壳在以下至少一个位置上开设有至少一条防爆槽：
所述壳体的所述底壁的第五面上，所述第五面为所述底壁朝外的一面；
所述壳体的所述侧壁的第六面上，所述第六面为所述侧壁朝外的一面；
所述第二盖体的所述第四面上。
当所述至少一条防爆槽开设于所述壳体的所述底壁的第五面上时：
所述至少一条防爆槽的长度为所述底壁直径的0.2倍至0.8倍，所述至少一条防爆槽的宽度为所述底壁直径的0.2倍至0.8倍，所述至少一条防爆槽的深度为所述底壁厚度的0.2倍至0.8倍。
当所述至少一条防爆槽设置于所述壳体的所述侧壁的第六面上时：
所述至少一条防爆槽沿所述壳体的厚度方向延伸；所述至少一条防爆槽的长度为所述壳体厚度的0.2倍至0.8倍，所述至少一条防爆槽的宽度为所述侧壁周长的0.003倍至0.2倍，所述至少一条防爆槽的深度为所述侧壁厚度的0.2倍至0.8倍。
当所述至少一条防爆槽设置于所述第二盖体的所述第四面上时：
所述至少一条防爆槽的长度为所述第二盖体直径的0.2倍至0.8倍，所述至少一条防爆槽的宽度为所述第二盖体直径的0.2倍至0.8倍，所述至少一条防爆槽的深度为所述第二盖体厚度的0.2倍至0.8倍。
所述壳体与所述第一盖体之间焊接或者熔接。
所述第一盖体与所述第一绝缘件之间为焊接、熔接或者注塑连接；所述第二盖体与所述第一绝缘件之间为焊接、熔接或者注塑连接。
所述第一绝缘件的内边缘覆盖环状的点胶层，所述第一绝缘件的内边缘与所述第一盖体、所述第二盖体之间通过点胶层密封。
所述第一盖体的外径大于等于8mm且小于等于16mm；
所述第一盖体的内边缘到所述第一盖体中心的距离大于等于3mm且小于等于14mm；
所述第一盖体的厚度大于等于0.05mm且小于等于0.5mm。
所述第一绝缘件的外径大于等于8mm且小于等于16mm；
所述第一绝缘件的内边缘到所述第一绝缘件中心的距离大于等于2mm且小于等于14mm；
所述第一绝缘件的厚度大于等于0.05mm且小于等于0.5mm。
所述第二盖体的直径大于等于6mm且小于等于16mm；
所述第二盖体的厚度大于等于0.05mm且小于等于0.5mm。
本申请第二方面提供一种电池，
至少包括：电芯和上述第一方面所述的电池外壳，所述电池外壳包裹在所述电芯的外侧。
所述电芯包括第一极耳和第二极耳，所述第一极耳与所述第一盖体的第一面连接，所述第二极耳与所述第二盖体的第三面连接。
本申请第三方面提供一种电池，
包括封装壳、电芯和第二盖体；
所述封装壳内设有用于容置所述电芯的容置腔，所述电芯中形成有与所述电芯同轴心的空腔，所述封装壳上设有与所述容置腔连通的孔洞，所述孔洞与所述空腔同轴心，所述第二盖体封盖在所述孔洞上，且所述第二盖体与所述封装壳之间设置有第一绝缘件；
所述第二盖体是导电件，所述第一绝缘件是密封胶圈。
所述第二盖体上设有朝向所述容置腔凸出的凸出部，所述凸出部与所述孔洞的边缘之间形成第一溢胶槽，所述第一溢胶槽沿所述电芯的径向的宽度为0.1～3mm之间。
所述封装壳上设有容置槽，所述第二盖体位于所述容置槽内，所述第二盖体的外边缘与所述容置槽的侧槽壁之间形成第二溢胶槽，所述第二溢胶槽沿电芯的径向的宽度为0.1～3mm。
所述电芯的下端面与所述封装壳底壁的内壁之间设有第一绝缘胶层，所述第一绝缘胶层上设有与所述空腔同轴心的第三通孔。
所述第三通孔的孔径大于所述空腔的直径。
所述第三通孔的孔径比所述空腔的直径大0～0.5mm。
所述电芯的上端面与所述封装壳的内顶壁之间设有第二绝缘胶层，所述第二绝缘胶层上设有与所述空腔同轴心的第四通孔。
所述第四通孔的孔径大于所述空腔的直径。
所述第四通孔的孔径比所述空腔的直径大0～0.5mm。
所述封装壳包括壳体和第一盖体，所述第一盖体与所述壳体密封连接，所述壳体和所述第一盖体围设形成用于容置所述电芯的所述容置腔，与所述容置腔连通的所述孔洞设置在所述第一盖体上；
所述电芯上设有第一极耳和第二极耳，所述第一极耳与所述壳体的底壁的内壁电连接，所述第二极耳与所述第二盖体电连接；
所述第二极耳与所述第一盖体之间设有第三绝缘胶层；
所述孔洞的边缘围设形成第一通孔。
所述第三绝缘胶层贴设在所述第一盖体的内壁上，沿所述电芯的径向， 所述第三绝缘胶层的外边缘小于所述第一盖体的外边缘；
所述第三绝缘胶层上还设有第五通孔，所述第五通孔与所述空腔同轴心，所述第五通孔的孔径小于所述孔洞沿径向的尺寸。
沿所述电芯的径向，所述第三绝缘胶层的外边缘比所述第一盖体的边缘尺寸小0.05～2mm；
所述第五通孔的孔径比所述孔洞的沿径向的尺寸小0～2mm。
所述第三绝缘胶层贴设在所述第二极耳靠近所述第一盖体的一侧，沿所述电芯的径向，所述第三绝缘胶层的边缘距离所述电芯的轴心的距离小于所述孔洞距离所述电芯的轴心的距离。
所述第一极耳朝向所述电芯的表面上设有凹陷的焊印，所述焊印位于与所述第三通孔以及所述空腔对应的区域内。
所述壳体的底壁外侧为光滑的平面或圆弧面。
所述焊印的深度为20～200μm；或，焊接后形成的第一焊点的高度为10～120μm。
所述第二溢胶槽内还设有密封胶，所述密封胶用于密封所述第二盖体与所述封装壳之间的间隙。
本申请第四方面提供一种电子设备，
至少包括：电子设备本体和上述第一方面、第二方面、第三方面中所述的电池，所述电池为所述电子设备本体提供电能。
本申请提供的电池外壳、电池和电子设备，包括：壳体、第一盖体、第一绝缘件和第二盖体，其中：壳体包括底壁和连接于底壁的侧壁；第一盖体包括相对设置的第一面和第二面，第二盖体包括相对设置的第三面和第四面，第一盖体的第一面连接于侧壁远离底壁的一端，第一盖体的第二面通过第一绝缘件与第二盖体的第三面连接，第一盖体开设有第一通孔，第一绝缘件上开设有与第一通孔对应的第二通孔。壳体、第一盖体、第一绝缘件和第二盖体依次连接的结构可以提高电池整体的密封性。因此，本申请提供的电池外壳、电池和电子设备解决了壳体、密封环和壳盖之间通过过盈配合制成的电池的密封性较差的技术问题。
附图说明
图1为本申请实施例一提供的一种电池外壳的正视图；
图2为图1中沿E-E的剖视图；
图3为本申请实施例一提供的一种电池外壳的局部放大图；
图4为本申请实施例一提供的一种电池外壳的外观示意图；
图5为本申请实施例一提供的一种电池的剖视图；
图6为本申请实施例二提供的电池外壳的正视图；
图7为本申请实施例二提供的电池外壳组装成电池后的剖视图；
图8为本申请实施例二提供的电池外壳中壳盖的正视图；
图9为本申请实施例二提供的电池外壳中壳盖的剖视图；
图10为本申请实施例二提供的电池外壳中壳盖的仰视图；
图11为本申请实施例二提供的电池外壳中第二盖体的剖视图；
图12为本申请实施例二提供的电池外壳中第二盖体的仰视图；
图13为本申请实施例二提供的电池外壳中壳盖与第二极耳连接的仰视图；
图14为本申请实施例三提供的电池的结构示意图；
图15为本申请实施例三提供的电池的分解结构示意图；
图16为本申请实施例三提供的电池的一种内部结构示意图；
图17为本申请实施例三提供的电池的另一种内部结构示意图；
图18为本申请实施例三提供的电池中第一绝缘胶层的结构示意图。
附图标记说明：
1:封装壳；          10：壳体；           110：第一盖体；
111：第一通孔；     120：第一绝缘件；    121：第二通孔；
130：第二盖体；     131：凸出部；        132：注液口；
133：环形槽；       140：底壁；          150：侧壁；
160：防爆槽；       20：电芯；           210：第一极耳；
220：第二极耳；     221：第二焊点；      230：空腔；
30：第一溢胶槽；    40：第二溢胶槽；     50：第一绝缘胶层；
501：第三通孔；     502：第一切边；      60：第二绝缘胶层；
601：第四通孔；     602：第二切边；      70：第三绝缘胶层；
701：第五通孔；     80：封口钉。
具体实施方式
本申请的实施方式部分使用的术语仅用于对本申请的具体实施例进行解释，而非旨在限定本申请。
纽扣电池也称电池，是指外形尺寸像一颗小纽扣的电池，一般来说其直径较大，厚度较薄。纽扣电池因体形较小，故在各种微型电子产品中得到了广泛的应用，如可穿戴设备：无线耳机，运动手表，手环，戒指等电子产品。由于电池的内部属于密闭空间，因此，密封性对于电池而言极其重要。
相关技术中，电池包括筒状壳体和罩设在筒状壳体外侧的筒状壳盖，壳体的外壁与壳盖的内壁之间环设密封环，为了实现壳体与壳盖之间的密封，三者之间一般是通过过盈配合密封。
然而，壳体、密封环和壳盖之间通过过盈配合制成的电池的密封性较差。
基于上述问题，本申请实施例提供一种电池外壳、电池和电子设备，在第一盖体外通过第一绝缘件连接第二盖体的结构，使得电池外壳的密封性更强，在该电池外壳用于电池组装时，能够提高电池的密封性，提高电池的性能。
实施例一。
如图1至图4所示，本申请实施例一提供一种电池外壳，该电池外壳包括：壳体10、第一盖体110、第一绝缘件120和第二盖体130，其中：
壳体10包括底壁140和连接于底壁140的侧壁150；第一盖体110包括相对设置的第一面和第二面，第二盖体130包括相对设置的第三面和第四面，第一盖体110的第一面连接于侧壁150远离底壁140的一端，第一盖体110的第二面通过第一绝缘件120与第二盖体130的第三面连接，第一盖体110开设有第一通孔，第一绝缘件120上开设有与第一通孔对应的第二通孔。
可以理解的是，第一面为第一盖体110朝向底壁140的一面，第二面为第一盖体110背离底壁140的一面；第三面为第二盖体130朝向底壁140的一面，第四面为第二盖体130背离底壁140的一面。
其中，第一绝缘件120可为橡胶圈，也可以为绝缘胶圈或者其他绝缘 材料制成的连接件；壳体10、第一盖体110和第二盖体130均为金属导电材料，例如铝锰合金等，在此不作限定。
本实施例中，该电池外壳可用于电池的组装。如图2和图3所示，壳体10包括底壁140和连接于底壁140的侧壁150，第一盖体110的第二面通过第一绝缘件120与第二盖体130的第三面连接，第一盖体110开设有第一通孔，第一绝缘件120上开设有与第一通孔对应的第二通孔。在使用该电池外壳组装电池时，将电池电芯20放入壳体10并且注入电解液之后，通过第一盖体110盖合于壳体10上实现电池外壳的密封，同时，电芯20的极耳可以依次从第一盖体110的第一通孔和第一绝缘件120的第二通孔伸出，与第二盖体130的第三面连接。一方面，第一盖体110、第一绝缘件120和第二盖体130的结构可以提高电池外壳整体的密封性；另一方面，电芯20的一个极耳可连接于第一盖体110之上，另一个极耳可以依次从第一盖体110的第一通孔和第一绝缘件120的第二通孔伸出，与第二盖体130的第三面连接，由于第二盖体130与第一盖体110之间通过第一绝缘件120绝缘隔离，可保证电芯20的两个极耳之间绝缘，以防止正负极短路。
本实施例中，电池外壳包括：包括：壳体10、第一盖体110、第一绝缘件120和第二盖体130，其中：壳体10包括底壁140和连接于底壁140的侧壁150；第一盖体110包括相对设置的第一面和第二面，第二盖体130包括相对设置的第三面和第四面，第一盖体110的第一面连接于侧壁150远离底壁140的一端，第一盖体110的第二面通过第一绝缘件120与第二盖体130的第三面连接，第一盖体110开设有第一通孔，第一绝缘件120上开设有与第一通孔对应的第二通孔。在第一盖体外通过第一绝缘件连接第二盖体的结构，使得电池外壳的密封性更强，在该电池外壳用于电池组装时，能够提高电池的密封性，提高电池的性能。
可选的，如图2所示，底壁140为锥面或者球面。
本实施例中，底壁140为锥面或者球面。相同尺寸的电池外壳，锥面或者球面的底壁相对于扁平的底壁来说，内部空间在厚度方向上更高，使得电池外壳在用于电池组装时，除极耳厚度占用的空间之外，有更多空间容纳电池电解液，增大电解液的保有量，提高电池性能。
进一步的，锥面或者球面的高度大于或者等于0.05毫米。
本实施例中，电池外壳在用于电池组装时，尤其是在用于锂离子电池 组装时，底壁140的锥面或者球面的高度大于或者等于0.05毫米，相对于电池外壳的整体尺寸，内部空间在厚度方向上增高达到了一定的比例，在其用于电池组装时，能够容纳电池电解液的空间进一步提高，电解液的保有量进一步增大，电池性能也进一步提高。
可选的，如图1、图3和图4所示，电池外壳在以下至少一个位置上开设有至少一条防爆槽160：
壳体10的底壁140的第五面上，第五面为底壁140朝外的一面；
壳体10的侧壁150的第六面上，第六面为侧壁150朝外的一面；
第二盖体130的第四面上。
本实施例中，电池外壳上可开设有至少一条防爆槽160，该防爆槽160可以开设于壳体10的底壁140朝外的一面上，也可以开设于壳体10的侧壁150朝外的一面上，还可以开设于第二盖体130的第四面，也就是背离壳体10的一面上。
如图1和图4所示，至少一条防爆槽160可为一字型，一字型是常见的凹槽形状之一；防爆槽160也可以设置为两条一字型凹槽形成的十字架或者其他形状，在此不作限定。
当使用电池外壳组装电池时，工作中的电池内部的电解液产生化学反应将会释放气体，尤其是当电池内部短路时，释放气体浓度较高，内部气压将会较大。在电池外壳上设置有防爆槽160，能够缓解电池外壳内部高压气体对壳体10的压力，防止因壳体10内部气压过高而导致壳体10开裂甚至爆炸，危害安全。
进一步的，当至少一条防爆槽160开设于壳体10的底壁140的第五面上时：至少一条防爆槽160的长度为底壁140直径的0.2倍至0.8倍，至少一条防爆槽160的宽度为底壁140直径的0.2倍至0.8倍，至少一条防爆槽160的深度为底壁140厚度的0.2倍至0.8倍。
本实施例中，当至少一条防爆槽160开设于壳体的底壁140的第五面上时，防爆槽160的长度和宽度可以限定在底壁140直径的0.2倍至0.8倍，过短将无法起到冲压的作用，过长将会影响电池外壳整体的稳定性，在内部存在气压过大时，容易造成电池外壳的开裂，适得其反；
此外，可以理解的是，由于电池外壳在用于电池组装时，内部注有电解液，因此，防爆槽160不可为通槽，否则将会导致电解液漏出，危害安 全。本实施例中，将防爆槽160的深度为底壁140厚度的0.2倍至0.8倍，过浅将无法起到冲压的作用，过深将会影响电池外壳整体的稳定性，在内部存在气压时，防爆槽160容易被冲破，适得其反。
进一步的，当至少一条防爆槽160设置于壳体10的侧壁150的第六面上时：所述至少一条防爆槽160沿壳体10的厚度方向延伸；至少一条防爆槽160的长度为壳体10厚度的0.2倍至0.8倍，至少一条防爆槽160的宽度为侧壁150周长的0.003倍至0.2倍，至少一条防爆槽160的深度为侧壁150厚度的0.2倍至0.8倍。
本实施例中，当至少一条防爆槽160开设于壳体10的侧壁150的第六面上时，防爆槽160沿壳体10的厚度方向延伸，防爆槽160的延伸方向与第一盖体110和第二盖体130垂直。基于上一实施例同样的理由，将防爆槽160的长度限定为壳体10厚度的0.2倍至0.8倍，将防爆槽160的宽度限定为侧壁150周长的0.003倍至0.2倍，将防爆槽160的深度限定为侧壁150厚度的0.2倍至0.8倍，在使防爆槽160起到冲压作用的同时，保证电池外壳的整体稳定性，为避免重复，在此不再赘述。
进一步的，当至少一条防爆槽160设置于第二盖体130的第四面上时：至少一条防爆槽160的长度为第二盖体130直径的0.2倍至0.8倍，至少一条防爆槽160的宽度为第二盖体130直径的0.2倍至0.8倍，至少一条防爆槽160的深度为第二盖体130厚度的0.2倍至0.8倍。
本实施例中，当至少一条防爆槽160设置于第二盖体130的第四面上，即第二盖体130朝外的一面时。基于上一实施例同样的理由，将防爆槽160的长度限定为第二盖体130直径的0.2倍至0.8倍，将防爆槽160的宽度限定为第二盖体130直径的0.2倍至0.8倍，将防爆槽160的深度限定为第二盖体130厚度的0.2倍至0.8倍，在使防爆槽160起到冲压作用的同时，保证电池外壳的整体稳定性，为避免重复，在此不再赘述。
可选的，壳体10与第一盖体110之间焊接或者熔接。
本实施例中，壳体10与第一盖体110之间可激光焊接，也可电焊接，还可热封熔接，在此不作限定。将壳体10与第一盖体110之间焊接或者熔接，在电池外壳用于电池组装时，能够进一步提高电池外壳的密封性，防止电解液漏出，进一步提高电池的性能。
可选的，第一盖体110与第一绝缘件120之间为焊接、熔接或者注塑 连接；第二盖体130与第一绝缘件120之间为焊接、熔接或者注塑连接。
本实施例中，第一盖体110与第一绝缘件120之间可激光焊接，也可电焊接，还可热封熔接或者注塑连接；同样的，第二盖体130与第一绝缘件120之间可激光焊接，也可电焊接，还可热封熔接或者注塑连接，在此不作限定。这样，在电池外壳用于电池组装时，能够进一步提高电池外壳的密封性，防止电解液漏出，进一步提高电池的性能。
综上所述，本实施例提供的电池外壳，包括：壳体10、第一盖体110、第一绝缘件120和第二盖体130，其中：壳体10包括底壁140和连接于底壁140的侧壁150，底壁140为锥面或者球面；第一盖体110包括相对设置的第一面和第二面，第二盖体130包括相对设置的第三面和第四面，第一盖体110的第一面连接于侧壁150远离底壁140的一端，第一盖体110的第二面通过第一绝缘件120与第二盖体130的第三面连接，第一盖体110的开设有第一通孔，第一绝缘件120上开设有与第一通孔对应的第二通孔。
由于壳体10与第一盖体110、第一绝缘件120和第二盖体130构成的壳盖之间可以通过焊接、熔接等方式连接在一起，其密封性较好。因此，在第一盖体110外通过第一绝缘件120连接第二盖体130的结构，使得电池外壳的密封性更强，在该电池外壳用于电池组装时，能够提高电池的密封性，提高电池的性能
如图5所示，本实施例还提供一种电池，电池包括如上述图1至图4所示实施例提供的电池外壳，以及收容于电池外壳中的电芯20，其中，电芯20的第一极耳210与第一盖体110连接，电芯20的第二极耳220与第二盖体130连接。
本实施例中，电芯20的第一极耳210为正极极耳时，电芯20的第二极耳220即为负极极耳，电芯20的第一极耳210为负极极耳时，电芯20的第二极耳220即为正极极耳，在此以电芯20的第一极耳210为正极极耳，第二极耳220为负极极耳进行说明。
本实施例中，采用上述实施例提供的电池外壳封装电池，壳体10、第一盖体110、第一绝缘件120和第二盖体130依次连接的结构可以提高电池整体的密封性。并且，电芯20的正极片引出第一极耳210可与第一盖体110连接，负极片引出第二极耳220可与第二盖体130连接，由于第一盖体110与第二盖体130之间有第一绝缘件120进行隔离，使得电芯20的正 极极耳和负极极耳之间绝缘，而不会发生短路，保证电池正常工作。
实施例二。
如图6和图7所示，本申请实施例二提供一种电池外壳，用于包裹在电芯20外侧，包括：壳体10，电池的电芯20可以放在壳体10中。其中，壳体10包括底壁140和环形的侧壁150，且侧壁150的底端与底壁140相连；侧壁150的顶端具有开口。
具体的，侧壁150的底端与底壁140之间可以通过焊接、熔接、粘接或者一体成型等方式连接在一起，对此不做限制。
电芯20上包括第一极耳(未示出)和第二极耳220，其中，第一极耳可以是正极耳，第二极耳220可以是负极耳；或者，第一极耳可以是负极耳，第二极耳220可以是正极耳。
本实施例中，还包括第一盖体110、第一绝缘件120和第二盖体130。其中，第一盖体110、第一绝缘件120和第二盖体130共同形成壳盖，壳盖的一侧端面与壳体10开口的端相连，第一盖体110底端端面与壳体10的开口端面相连。可以将电芯20密封于壳盖与壳体10构成的容置腔中。
具体的，第二盖体130可以与第二极耳220电连接。第一盖体110可以与第一极耳(未示出)电连接；或者，第一盖体110可以通过壳体10与第一极耳电连接。示例性的，第一极耳可以与底壁140的内壁连接。
其中，第一盖体110可以为金属环，第一绝缘件120可以为绝缘环，第二盖体130可以为金属片。
进一步的，壳体10与壳盖之间可以通过焊接、熔接或者粘接等方式连接在一起，对此不做限制。
继续参考图8-图10，第一绝缘件120位于第一盖体110背离壳体10的底壁140的一侧，第二盖体130位于第一绝缘件120背离第一盖体110的一侧。也就是说，第一绝缘件120位于第一盖体110和第二盖体130之间。
其中，第一绝缘件120内边缘围设成的中心孔为第二通孔121，第一绝缘件120可以避免第一盖体110和第二盖体130接触导致的短路，同时，第一盖体110和第二盖体130之间通过第一绝缘件120密封的连接在一起。
进一步的，第一绝缘件120可以是聚丙烯材质制成的密封圈、橡胶圈等，也可以是绝缘胶圈或者其他绝缘材料制成的连接件，对此不做限制。
继续参考图11和图12，本实施例中，第二盖体130朝向第一盖体110的一侧端面上环设环形槽133，环形槽133位于第二通孔121正对的区域。或者，第二盖体130朝向第一盖体110的一侧端面上环设凸棱，也就是说，环形槽133可以换成凸棱。凸棱位于第二通孔121正对的区域。从第一绝缘件120的内边缘围设的中心孔来观察第二盖体130时，可以通过环形槽133或凸棱与第一绝缘件120的内边缘的相对位置，可以得知第二盖体130与第一绝缘件120之间的相对位置，从而可以对第二盖体130进行定位，可以判断第一绝缘件120与第二盖体130之间是否对齐。
需要说明的是，在实际生产过程中，可以将环形槽133或凸棱的外边缘设置的靠近第一绝缘件120的内边缘，此时，只要通过检测设备能够观察到环形槽133或凸棱，就可以认为第一绝缘件120和第二盖体130之间是对齐的。由此可知，第一绝缘件120和第二盖体130之间的对齐是允许存在一定工艺误差的。
本实施例中，第一绝缘件120的内边缘覆盖环状的点胶层，第一绝缘件120的内边缘与第二盖体130、第一盖体110之间均通过点胶层密封。也就是说，第一绝缘件120的内边缘被点胶层密封在第二盖体130与第一盖体110内边缘之间。同时，点胶层还可以避免第一绝缘件120与电池内的电解液接触而造成腐蚀。
点胶层可以通过点胶的方式形成，在第一绝缘件120内边缘进行点胶，由于胶水具有流动性，在点胶时，胶水容易从点胶处向第二盖体130的中心流动。而环形槽133处于第一绝缘件120内边缘与第二盖体130中心之间的区域，因此，胶水流向第二盖体130中心方向时会进入环形槽133，环形槽133具有容置胶水的能力，可以避免胶水继续向第二盖体130中心流动。胶水无法流至环形槽133至第二盖体130中心之间的区域，该区域可以正常与极耳电连接。
或者，凸棱处于第一绝缘件120内边缘与第二盖体130中心之间的区域，因此，胶水流向第二盖体130中心方向时会被凸棱挡住，从而避免胶水继续向第二盖体130中心流动。胶水无法流至凸棱与第二盖体130中心之间的区域，该区域可以正常与极耳电连接。
进一步的，环形槽133或凸棱的截面形状可以是矩形、弧形、三角形、半圆形等形状，对此不做限制。
进一步的，环形槽133或凸棱可以是圆环，也就说，环形槽133或凸棱围设成的形状可以是圆形。当然的，环形槽133或凸棱围设成的形状也可以是矩形、三角形、多边形或者星形等形状，对此不做限制。通过观察环形槽133或凸棱与其他部件所处的位置，可以对第二盖体130进行视觉上的定位。
本实施例提供的电池外壳，通过包括：壳体10、第一盖体110、第一绝缘件120和第二盖体130，壳体10一侧端面设有开口，第一盖体110一侧端面与壳体10的开口端面相连，第一绝缘件120位于第一盖体110背离壳体10的一侧，第二盖体130位于第一绝缘件120背离第一盖体110的一侧；第一盖体110、第一绝缘件120和第二盖体130共同形成壳盖，壳盖的一侧端面与壳体10开口的端面相连，可以将电芯20密封于壳盖与壳体10构成的容置腔中。
第一绝缘件120内边缘围设成的中心孔为第二通孔121，第二盖体130朝向第一盖体110的一侧端面上环设环形槽133或凸棱，环形槽133或凸棱位于第二通孔121正对的区域。从第一绝缘件120的内边缘围设的中心孔来观察第二盖体130时，可以通过环形槽133或凸棱与第一绝缘件120的内边缘的相对位置，可以得知第二盖体130与第一绝缘件120之间的相对位置，从而可以对第二盖体130进行定位，可以判断第一绝缘件120与第二盖体130之间是否对齐。因此，本实施例提供的电池外壳，解决了通过从第一绝缘件120的内边缘围设的中心孔来观察第二盖体130时，正对第一绝缘件120的内边缘围设的中心孔的第二盖体130表面平整光滑，几乎没有区别，无法判断第二盖体130与第一绝缘件120的相对位置，从而无法判断第一绝缘件120与第二盖体130之间是否对齐的技术问题。
本实施例中，第一盖体110内边缘围设成的中心孔为第一通孔111，第二通孔121与第一通孔111至少部分重叠。其中第二极耳220可以从壳体10伸出第二通孔121与第一通孔111重叠的部分而与第二盖体130连接。也就是说，第二极耳220可以依次从第一通孔111和第二通孔121中伸出，与第二盖体130朝向壳体10的一侧电连接。
其中，第一通孔111与环形槽133围设区域的形状之间的相对位置关系，可以作为壳盖制作完成后是否对齐的质量检测参数。
第二通孔121和第一通孔111的形状可以是矩形、圆形或其他形状， 对此不做限制。
为了提高第一绝缘件120对第一盖体110和第二盖体130之间连接紧密性和密封性，可以对第一盖体110和第二盖体130进行加热加压，这样，在高温高压下，夹设在导第一盖体110和第二盖体130之间的第一绝缘件120会产生部分溢出第一盖体110和第二盖体130接合处的溢胶，一部分从第一绝缘件120的内边缘溢出至第一绝缘件120、第一盖体110的内边缘和第二盖体130接合处，这样，溢出的胶能够进一步的对第一盖体110和第二盖体130之间进行密封粘接，提高了第一绝缘件120对第一盖体110和第二盖体130连接和密封的可靠性。
由于在第一绝缘件120内边缘与第二盖体130中心之间的区域设置了环形槽133或凸棱，环形槽133或凸棱可以阻止溢出的胶朝向第二盖体130中心方向继续流动，避免溢胶对第二盖体130与极耳之间的连接造成影响。
继续参考图7和图13，本实施例中，还可以包括第二焊点221，第二盖体130用于与电芯20的第二极耳220焊接以形成第二焊点221，第二焊点221正对环形槽133或凸棱内边缘围设的区域。由于形成的第二焊点221位于环形槽133和凸棱内边缘所围设的区域内，避免点胶或溢胶对第二焊点221与第二极耳220之间的连接造成影响。其中，第二焊点221与第二极耳220之间可以通过激光焊接相连。
本实施例中，第一盖体110内边缘在底壁140上的投影位于第一绝缘件120在底壁140上的投影内。如此设置，第一绝缘件120的内边缘超过了第一盖体110的内边缘，可以阻止第一盖体110的内边缘与第二盖体130接触，起到绝缘防护的效果。
本实施例中，第一绝缘件120的外径大于等于第一盖体110的外径。第一绝缘件120的外边缘超过了第一盖体110的外边缘，可以阻止第一盖体110的外边缘与第二盖体130的外边缘接触，起到绝缘防护的效果。
可选的，第一绝缘件120的外径大于等于第二盖体130的外径。第一绝缘件120的外边缘超过了第二盖体130的外边缘，可以阻止第二盖体130的外边缘与第一盖体110的外边缘接触，起到绝缘防护的效果。
可选的，第一绝缘件120的外径同时大于等于第一盖体110和第二盖体130的外径。第一绝缘件120的外边缘超过了第一盖体110和第二盖体130的外边缘，可以阻止第二盖体130的外边缘与第一盖体110的外边缘 接触，起到绝缘防护的效果。
本实施例中，环形槽133或凸棱与第二盖体130中心的距离大于等于2mm且小于等于14mm。也就说，环形槽133或凸棱的靠近第二盖体130中心一侧的壁面与第二盖体130中心的距离大于等于2mm且小于等于14mm。这样，满足扣式电池的外观尺寸。
环形槽133或凸棱的宽度大于等于0.05mm且小于等于2mm；环形槽133的槽深或凸棱的高度大于等于0.02mm且小于等于0.4mm。这样，易于视觉定位，具有容纳胶水的能力，同时还满足扣式电池的外观尺寸。
本实施例中，第一盖体110的外径大于等于8mm且小于等于16mm；第一盖体110的内边缘到第一盖体110中心的距离大于等于3mm且小于等于14mm；第一盖体110的厚度大于等于0.05mm且小于等于0.5mm。这样，满足扣式电池的外观尺寸。
本实施例中，第一绝缘件120的外径大于等于8mm且小于等于16mm；第一绝缘件120的内边缘到第一绝缘件120中心的距离大于等于2mm且小于等于14mm；第一绝缘件120的厚度大于等于0.05mm且小于等于0.5mm。这样，起到绝缘密封的同时，满足扣式电池的外观尺寸。
本实施例中，第二盖体130的直径大于等于6mm且小于等于16mm；第二盖体130的厚度大于等于0.05mm且小于等于0.5mm。这样，满足扣式电池的外观尺寸。
本实施例中提供的电池外壳，将第一盖体110、第一绝缘件120和第二盖体130依次贴合形成壳盖并进行加热加压密封和点胶密封。由于壳体10与第一盖体110、第一绝缘件120和第二盖体130构成的壳盖之间可以通过焊接、熔接等方式连接在一起，其密封性较好。因此，在第一盖体110外通过第一绝缘件120连接第二盖体130的结构，使得电池外壳的密封性更强，在该电池外壳用于电池组装时，能够提高电池的密封性，提高电池的性能。
胶水可以从密封处流入环形槽133，环形槽133阻止了胶水继续向第二盖体130中心流动；或者胶水流向第二盖体130中心方向时被凸棱挡住，从而避免了胶水对第二极耳220和第二盖体130的连接影响。壳盖的一侧端面与壳体10开口的端面相连，可以将电芯20密封于壳盖与壳体10构成的容置腔中。
另外，本实施例还提供一种电池，至少包括电芯20和上述实施例中的电池外壳，电池外壳包裹在电芯20的外侧。
电芯20可以为卷绕式电芯，具体的，卷绕式电芯包括第一极片、第二极片以及将第一极片和第二极片隔开的隔膜；第一极片上设置有第一极耳(未示出)，第一极耳可以通过焊接的方式设置在第一极片上，第二极片上设置有第二极耳220，第二极耳220可以通过焊接的方式设置在第二极片上；卷绕过程中第一极片、第二极片以及隔膜从卷绕首端开始朝同一方向逐层卷绕并最终形成卷绕式电芯。
当第一极片极片为正极片时，第二极片极片为负极片时，第一极耳为正极耳，第二极耳220为负极耳；或者，当第一极片极片为负极片时，第二极片极片为正极片时，第一极耳为负极耳，第二极耳220为正极耳。
其中，电池的结构和工作原理已在上述实施例中进行了详细的阐述，在此，不再一一进行赘述。
本实施例中提供的电池，将第一盖体110、第一绝缘件120和第二盖体130依次贴合形成壳盖并进行加热加压密封和点胶密封，胶水可以从密封处流入环形槽133，环形槽133阻止了胶水继续向第二盖体130中心流动；或者胶水流向第二盖体130中心方向时被凸棱挡住，从而避免了胶水对第二极耳220和第二盖体130的连接影响。从第一绝缘件120的内边缘围设的中心孔来观察第二盖体130时，可以通过环形槽133或凸棱与第一绝缘件120的内边缘的相对位置，可以得知第二盖体130与第一绝缘件120之间的相对位置，从而可以对第二盖体130进行定位，可以判断第一绝缘件120与第二盖体130之间是否对齐。壳盖的一侧端面与壳体10开口的端面相连，可以将卷绕式电芯密封于壳盖与壳体10构成的容置腔中。壳体10的底壁140与第一极耳电连接，第二盖体130与第二极耳220电连接，以分别形成了电池的正负电极。由于壳体10与第一盖体110、第一绝缘件120和第二盖体130构成的壳盖之间可以通过焊接、熔接等方式连接在一起，其密封性较好。因此，在第一盖体110外通过第一绝缘件120连接第二盖体130的结构，使得电池外壳的密封性更强，在该电池外壳用于电池组装时，能够提高电池的密封性，提高电池的性能。
当该扣式电池应用在电子设备上时，壳体10背离第一盖体110的一侧与电子设备的正极或负极连接导通，第二盖体130与电子设备的负极或正 极连接导通，从而使电池为电子设备供电。
实施例三。
如图14和图15所示，本申请实施例三提供的电池包括：封装壳1、电芯20和第二盖体130，封装壳1内设有用于容置电芯20的容置腔，封装壳1上设有与容置腔连通的孔洞，第二盖体130封盖在孔洞上，且第二盖体130与封装壳1之间设置有第一绝缘件120，第二盖体130与封装壳之间通过第一绝缘件120绝缘且密封的连接在一起，以实现第二盖体130与封装壳1之间的绝缘及密封的目的。其中，第一绝缘件120可以是聚丙烯材质制成的绝缘件。
其中，第二盖体130可以是导电件，第一绝缘件120可以是密封胶圈。
可选的，如图16和图17所示，封装壳1包括壳体10和第一盖体110，壳体10上设有朝向壳体10的底壁140延伸的凹槽，凹槽形成用于容置电芯20的容置腔，第一盖体110封盖在容置腔上，以使壳体10和第一盖体110围设形成具有封闭的容置腔的封装壳1，其中，为了提高封装壳1的密封性，第一盖体110与壳体10之间密封连接，例如，第一盖体110与壳体10之间通过焊接、粘接等方式连接。
进一步的，与容置腔连通的孔洞设置在第一盖体110上，第二盖体130封盖在孔洞处，第二盖体130与第一盖体110之间通过第一绝缘件120绝缘且密封的连接。孔洞的边缘围设形成第一通孔。
其中，第一绝缘件120可以为环状，为了提高第一绝缘件120连接第二盖体130与第一盖体110之间的连接紧密性，可以对第二盖体130和第一盖体110进行加热加压，这样，在高温高压下，夹设在第二盖体130与第一盖体110之间的第一绝缘件120会产生部分溢出第二盖体130与第一盖体110接合处的溢胶，一部分从第一绝缘件120的外边缘溢出第二盖体130与第一盖体110的接合处，另一部分从第一绝缘件120的内边缘溢出第一绝缘件120与第一盖体110的孔洞的边缘接合处，这样，溢出的胶能够进一步的对第二盖体130与第一盖体110之间进行密封粘接，提高了第一绝缘件120在连接第二盖体130与第一盖体110的连接可靠性。
进一步的，如图16所示，第二盖体130上设有朝向容置腔凸出的凸出部131，凸出部131与孔洞的边缘之间形成一个环形的第一溢胶槽30，这样，第一绝缘件120的内边缘溢出的胶可以位于第一溢胶槽30内，溢出的 胶可以进一步的提高第二盖体130与第一盖体110之间的密封性，其中，第一溢胶槽30沿电芯20的径向的宽度为0.1～3mm，这样，在容纳溢出的胶的同时，还能够满足电池的外观尺寸。
可选的，如图4所示，第一盖体110上还设有容置槽，第二盖体130位于容置槽内，且第二盖体130的外边缘与容置槽的侧槽壁之间形成第二溢胶槽40，第一绝缘件120的外边缘溢出的胶可以位于第二溢胶槽40内，第二溢胶槽40内的胶可以进一步的提高第二盖体130与第一盖体110之间的密封性，进而提高电池的整体密封性，且溢出的胶位于第二溢胶槽40内，这样，可以提高电池的表面平整度以及整体美观性，且将第二溢胶槽40沿电芯20的径向的宽度设置为0.1～3mm之间，这样，在保证容纳溢出胶的同时，可以满足电池的外观尺寸。
进一步的，为了防止水等液体从第二溢胶槽40处进入电池的空腔内，还可以在第二溢胶槽40内设置密封胶，通过密封胶来密封第二盖体130与封装壳1之间的间隙，以提高电池的密封性，其中，密封胶可以是由丙烯酸、环氧、聚氨酯中的一种和硬化剂混合形成的胶，也可以是其他密封材质形成的密封胶，对此，本实施例不做限制。
在一种可选的实施方式中，电芯20为卷绕式电芯，具体的，卷绕式电芯包括第一极片、第二极片以及将第一极片和第二极片隔开的隔膜；第一极片上设置有第一极耳210，第一极耳210可以通过焊接的方式设置在第一极片上，第二极片上设置有第二极耳220，第二极耳220可以通过焊接的方式设置在第二极片上；卷绕过程中第一极片、第二极片以及隔膜从卷绕首端开始朝同一方向逐层卷绕并最终形成卷绕式电芯，同时，在电芯20的轴心处形成一个与电芯20同轴心的空腔230。
电芯20的第一极片可以为正极片，第二极片可以为负极片，此时，设置在第一极片上的第一极耳210为正极耳，设置在第二极片上的第二极耳220为负极耳，具体实现时，将电芯20容置于容置腔内，正极耳与壳体10的底壁140的内壁通过焊接的方式电连接以使壳体10形成为电池的正极，负极耳与第二盖体130电连接以使第二盖体130形成为电池的负极，当该电池应用在电子设备上时，壳体10与电子设备的正极连接导通，第二盖体130与电子设备的负极连接导通，从而使电芯20为电子设备供电。
或者，电芯20的第一极片可以为负极片，第二极片可以为正极片，此 时，设置在第一极片上的第一极耳210为负极耳，设置在第二极片上的第二极耳220为正极耳，具体实现时，将电芯20容置于容置腔内，负极耳与壳体10通过焊接的方式电连接以使壳体10形成为电池的负极，正极耳与第二盖体130电连接，以使第二盖体130形成为电池的正极，当该电池应用在电子设备上时，壳体10与电子设备的负极连接导通，第二盖体130与电子设备的正极连接导通，从而使电芯20为电子设备供电。
由于电池在装配过程中，是先将电芯20放置在容置腔内后，再将电芯20上的第一极耳210和壳体10的底壁140的内壁通过焊接等方式进行电连接，为了提高第一极耳210与壳体10的底壁140的内壁的电连接的可靠性，通常，在电芯20的空腔230内插入一根柱状的顶针，通过顶针将第一极耳210抵接在壳体10的底壁140的内壁上，再对第一极耳210和壳体10的底壁140的内壁进行焊接。
需要说明的是，第一极耳210朝向电芯20的表面上设有凹陷的焊印，焊接设备在焊印处对第一极耳210和壳体10进行焊接，例如，可以采用电阻焊或者激光焊，当采用电阻焊时，其焊印可以为一个，而采用激光焊时，其焊印可以为四个，其中，为了确保焊接的可靠性，焊印的深度可以为20～200μm之间，或者，焊接后形成的第一焊点的高度可以为10～120μm之间，焊接后的第一焊点可以形成为一个或多个单独的焊点，也可以是多个焊点形成的一条直线，对此，本实施例不做限制。
而在电芯20的下端面与壳体10的底壁140的内壁之间设有第一绝缘胶层50，以防止电芯20与壳体10之间导电，在电芯20的上端面与第一盖体110之间设有第二绝缘胶层60，以防止电芯20与第一盖体110之间导电，因此，为了方便顶针插入到电芯20的空腔230内抵住第一极耳210，以及方便焊接设备焊接第一极耳210和壳体10，在本实施例中，在第一绝缘胶层50上设有与空腔230同轴心的第三通孔501，其中，第一极耳210上的焊印应在第三通孔501和空腔230所对应的区域内，也就是说，通过在第一绝缘胶层50上设置第三通孔501，这样，第一绝缘胶层50不会遮挡第一极耳210上的焊印，以方便焊接设备对第一极耳210和壳体10进行焊接，不需要在壳体10的底壁140外侧上设置焊印，即壳体10的底壁140外侧为光滑的平面或者圆弧面，由于将焊印设置在壳体10的底壁140外侧上，外部的一些强腐蚀物会通过壳体10的底壁140外侧上的焊印对电池进 行腐蚀，导致电池的安全可靠性低，因此，在本实施例中，将焊印设置在第一极耳210朝向电芯的表面上，避免外部的强腐蚀物腐蚀焊印，从而提高了电池的安全可靠性。
进一步的，在第二绝缘胶层60上设有与空腔230同轴心的第四通孔601，这样，顶针可以穿过第三通孔501和第四通孔601以及空腔230抵接在第一极耳210上，通过焊接设备对第一极耳210和壳体10进行焊接，从而提高第一极耳210与壳体10的底壁140的内壁的连接可靠性，简化了电池在装配时的难度，提高了电芯20的安全可靠性。
进一步的，为了方便顶针插入电芯20的空腔230内，第三通孔501的孔径可以大于空腔230的直径，第四通孔601的孔径可以大于空腔230的直径，这样，第三通孔501的边缘和第四通孔601的便于不会干涉顶针的插入。
进一步的，如图3和图4所示，为了保证第一绝缘胶层50和第二绝缘胶层60的工作可靠性，同时便于顶针的插入，在本实施例中，第三通孔501的孔径比空腔230的直径大0～0.5mm，第四通孔601的孔径比空腔230的直径大0～0.5mm，也就是说，理想状态下，第三通孔501和第四通孔601与空腔230的直径大小相等，而在制造存在误差时，为了避免第一绝缘胶层50和第二绝缘胶层60对顶针插入空腔230时进行干涉，因此，第三通孔501和第四通孔601的孔径可以大于空腔230的直径，只要保证电芯20与下端面与壳体10绝缘，以及电芯20的上端面与第一盖体110绝缘即可。
在上述实施例的基础上，为了保证第二极耳220与第二盖体130电连接时，第二极耳220不会与第一盖体110之间进行电连接，在本实施例中，第二极耳220与第一盖体110之间设有第三绝缘胶层70，通过第三绝缘胶层70使第一盖体110与第二极耳220之间绝缘，以提高第二极耳220与第二盖体130之间的电连接可靠性。
在一种可实现的实施例中，第三绝缘胶层70为环面，第三绝缘胶层70贴合在第一盖体110的内壁上，并覆盖第二极耳220与第一盖体110相对应的位置。
具体的，为了防止第三绝缘胶层70干涉第一盖体110与壳体10之间进行焊接或粘接等，沿电芯20的径向，第三绝缘胶层70的外边缘小于第一盖体110的外边缘。
进一步的，第三绝缘胶层70上还设有第五通孔701，第五通孔701与空腔230同轴心，为了防止第一盖体110与第二极耳220进行电连接，因此，在本实施例中，第五通孔701的孔径小于第一盖体110上孔洞沿径向的尺寸，这样，可以避免第二极耳220与第一盖体110之间进行电连接，而第二极耳220可以部分穿过第五通孔701与第二盖体130电连接。
在一个实施例中，沿电芯20的径向，第三绝缘胶层70的外边缘比第一盖体110的边缘尺寸小0.05～2mm，而第五通孔701的孔径比第一盖体110上孔洞的沿径向的尺寸小0～2mm，从而提高第二极耳220与第二盖体130之间的连接可靠性。
在另一个可实现的实施例中，第三绝缘胶层70也可以贴设在第二极耳220靠近第一盖体110的一侧上，形成第二极耳220的保护胶，沿电芯20的径向，第二极耳220上的第三绝缘胶层70的边缘距离电芯20的轴心的距离小于第一盖体110上孔洞距离电芯20的轴心的距离，也就是说，第二极耳220上的保护胶沿电芯20的径向朝向电芯20的轴心延伸，且第二极耳220上的保护胶的边缘超过了第一盖体110上孔洞的边缘，这样，可以保证第二极耳220不与第一盖体110电连接，从而提高第二极耳220与第二盖体130之间的连接可靠性。
在上述实施例的基础上，如图15和图18所示，为了防止第一绝缘胶层50干涉第一极耳210与电芯20上的极片连接，在本实施例中，对第一绝缘胶层50进行切边处理，这样，可以使第一绝缘胶层50的部分边缘形成直线形的切边，为了便于描述，在本文中，第一绝缘胶层50上的切边用第一切边502描述，沿电芯20的轴向，第一切边502与第一极耳210平齐，可以避免第一绝缘胶层50对第一极耳210与电芯20上的极片连接时进行干涉。
进一步的，为了避免第二极耳220与电芯20上的极片连接时进行干涉，在第二绝缘胶层60上也进行切边处理，这样，可以使第二绝缘胶层60的部分边缘形成直线形的切边，为了便于描述，在本文中，第二绝缘胶层60上的切边用第二切边602描述，沿电芯20的轴向，第二切边602与第二极耳220平齐，可以避免第二绝缘胶层60对第二极耳220与电芯20上的极片连接时进行干涉，从而提高电池的工作可靠性。
可选的，第二盖体130上还设有注液口132，当电芯20放置在容置腔 内，电芯20上的第一极耳210与壳体10的底壁140的内壁电连接，第二极耳220与第二盖体130电连接后，将电解液从第二盖体130上的注液口132注入至容置腔内，电解液注入完成后，用封口钉80封盖在注液口132上并密封。
进一步的，为了提高电池的表面平整度，可以在第二盖体130上设置容置封口钉80的槽，且槽的深度可以与封口钉80的厚度相等，这样，封口钉80封盖在注液口132上时，封口钉80与第二盖体130的表面平齐，从而提高了电池的表面平整度。
本申请实施例提供的电池，在具体实现时，首选，通过加热加压的方式将第一盖体110与第二盖体130之间通过第一绝缘件120绝缘且密封的连接在一起，再将电芯20放入壳体10的容置腔内，再将带有第二盖体130的第一盖体110通过焊接等方式将第一盖体110与壳体10进行密封连接，顶针插入电芯20的空腔230内，且顶针的第一端抵接在第一极耳210上，顶针的第二端伸出第一盖体110外，以方便用户握持，通过顶针使第一极耳210与壳体10的底壁140的内壁贴合，通过焊接设备将第一极耳210与壳体10之间进行焊接，并使电芯20上的第二极耳220与第二盖体130通过焊接等方式进行电连接，取出顶针，并将电解液从注液口132处注入进容置腔内，当电解液注入完成后，将封口钉80封盖在注液口132上，并通过粘接或者焊接的方式将封口钉80与注液口132处进行密封连接，从而完成电池的装配。
而且，在本申请实施例中，通过在第一绝缘胶层50上设置第三通孔501，在第二绝缘胶层60上设置第四通孔601，以及在第三绝缘胶层70上设置第五通孔701，这样，顶针可以依次穿过第五通孔701、第四通孔601、电芯20上的空腔230以及第三通孔501并抵接在第一极耳210上，简化了电池的装配难度，提高了电池的工作可靠性。
本申请实施例提供的电池中，由于壳体10与第一盖体110、第一绝缘件120和第二盖体130构成的壳盖之间可以通过焊接、熔接等方式连接在一起，其密封性较好。因此，在第一盖体110外通过第一绝缘件120连接第二盖体130的结构，使得电池外壳的密封性更强，在该电池外壳用于电池组装时，能够提高电池的密封性，提高电池的性能。第二盖体130上设有朝向容置腔凸出的凸出部131，凸出部131与孔洞的边缘之间形成第一 溢胶槽30，第一绝缘件120溢出的胶容置在第一溢胶槽30内，这样，第一溢胶槽30内溢出的胶可以进一步的对第二盖体130与封装壳1之间进行密封，从而提高电池的密封性。
实施例四
本申请实施例还提供一种电子设备，包括电子设备本体和实施例一、实施例二、实施例三中提供的电池，电池为电子设备本体提供电能。
其中，电子设备本体可以是穿戴电子设备或者其他电子产品，也可以是医疗中使用的医用电子设备等，对此，本实施例不做限制。
其中，电池的结构和工作原理已在实施例一中进行了详细的阐述，在此，不再一一进行赘述。
本申请实施例提供的电子设备，包括电子设备本体和为电子设备本体提供电能的电池，其中，由于壳体10与第一盖体110、第一绝缘件120和第二盖体130构成的壳盖之间可以通过焊接、熔接等方式连接在一起，其密封性较好。因此，在第一盖体110外通过第一绝缘件120连接第二盖体130的结构，使得电池外壳的密封性更强，在该电池外壳用于电池组装时，能够提高电池的密封性，提高电池的性能。
在本申请所提供的几个实施例中，应该理解到，所揭露的电池外壳、电池和电子设备，可以通过其它的方式实现。
这里需要说明的是，本申请实施例涉及的数值和数值范围为近似值，受制造工艺的影响，可能会存在一定范围的误差，这部分误差本领域技术人员可以认为忽略不计。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (39)

  1. 一种电池外壳，其特征在于，包括：壳体、第一盖体、第一绝缘件和第二盖体，其中：
    所述壳体包括底壁和连接于所述底壁的侧壁；所述第一盖体包括相对设置的第一面和第二面，所述第二盖体包括相对设置的第三面和第四面，所述第一盖体的所述第一面连接于所述侧壁远离所述底壁的一端，所述第一盖体的所述第二面通过所述第一绝缘件与所述第二盖体的所述第三面连接，所述第一盖体开设有第一通孔，所述第一绝缘件上开设有与所述第一通孔对应的第二通孔。
  2. 根据权利要求1所述的电池外壳，其特征在于，所述电池外壳用于包裹在电芯外侧，所述第一盖体为金属环，所述第一绝缘件为绝缘环，所述第二盖体为金属片；所述侧壁为环形侧壁，所述侧壁的底端与所述底壁连接，所述侧壁的顶端具有开口；
    所述第一盖体底端端面与所述开口端面相连，所述第一盖体的内边缘围设的区域为所述第一通孔，所述第一绝缘件的内边缘围设的区域为所述第二通孔，所述第一通孔与所述第二通孔至少部分重叠；
    所述第二盖体朝向所述第一盖体的一侧端面上环设环形槽或凸棱，所述环形槽或凸棱位于所述第二通孔正对的区域。
  3. 根据权利要求2所述的电池外壳，其特征在于，还包括：第二焊点，所述第二盖体用于与所述电芯的极耳焊接以形成所述第二焊点，所述第二焊点正对所述环形槽或凸棱内边缘围设的区域。
  4. 根据权利要求2所述的电池外壳，其特征在于，所述第一盖体内边缘在所述底壁上的投影位于所述第一绝缘件在所述底壁上的投影内。
  5. 根据权利要求2所述的电池外壳，其特征在于，所述第一绝缘件的外径大于等于所述第一盖体的外径；
    和/或，所述第一绝缘件的外径大于等于所述第二盖体的外径。
  6. 根据权利要求2-5任一所述的电池外壳，其特征在于，所述环形槽或凸棱与所述第二盖体中心的距离大于等于2mm且小于等于14mm。
  7. 根据权利要求2-5任一所述的电池外壳，其特征在于，所述环形槽 或凸棱的宽度大于等于0.05mm且小于等于2mm；
    所述环形槽的槽深或所述凸棱的高度大于等于0.02mm且小于等于0.4mm。
  8. 根据权利要求1-7任一所述的电池外壳，其特征在于，所述底壁为锥面或者球面。
  9. 根据权利要求8所述的电池外壳，其特征在于，所述锥面或者所述球面的高度大于或者等于0.05毫米。
  10. 根据权利要求1-9任一所述的电池外壳，其特征在于，所述电池外壳在以下至少一个位置上开设有至少一条防爆槽：
    所述壳体的所述底壁的第五面上，所述第五面为所述底壁朝外的一面；
    所述壳体的所述侧壁的第六面上，所述第六面为所述侧壁朝外的一面；
    所述第二盖体的所述第四面上。
  11. 根据权利要求10所述的电池外壳，其特征在于，当所述至少一条防爆槽开设于所述壳体的所述底壁的第五面上时：
    所述至少一条防爆槽的长度为所述底壁直径的0.2倍至0.8倍，所述至少一条防爆槽的宽度为所述底壁直径的0.2倍至0.8倍，所述至少一条防爆槽的深度为所述底壁厚度的0.2倍至0.8倍。
  12. 根据权利要求10所述的电池外壳，其特征在于，当所述至少一条防爆槽设置于所述壳体的所述侧壁的第六面上时：
    所述至少一条防爆槽沿所述壳体的厚度方向延伸；所述至少一条防爆槽的长度为所述壳体厚度的0.2倍至0.8倍，所述至少一条防爆槽的宽度为所述侧壁周长的0.003倍至0.2倍，所述至少一条防爆槽的深度为所述侧壁厚度的0.2倍至0.8倍。
  13. 根据权利要求10所述的电池外壳，其特征在于，当所述至少一条防爆槽设置于所述第二盖体的所述第四面上时：
    所述至少一条防爆槽的长度为所述第二盖体直径的0.2倍至0.8倍，所述至少一条防爆槽的宽度为所述第二盖体直径的0.2倍至0.8倍，所述至少一条防爆槽的深度为所述第二盖体厚度的0.2倍至0.8倍。
  14. 根据权利要求1-13任一所述的电池外壳，其特征在于，所述壳体 与所述第一盖体之间焊接或者熔接。
  15. 根据权利要求1-14任一所述的电池外壳，其特征在于，所述第一盖体与所述第一绝缘件之间为焊接、熔接或者注塑连接；所述第二盖体与所述第一绝缘件之间为焊接、熔接或者注塑连接。
  16. 根据权利要求1-15任一所述的电池外壳，其特征在于，所述第一绝缘件的内边缘覆盖环状的点胶层，所述第一绝缘件的内边缘与所述第一盖体、所述第二盖体之间通过点胶层密封。
  17. 根据权利要求1-16任一所述的电池外壳，其特征在于，所述第一盖体的外径大于等于8mm且小于等于16mm；
    所述第一盖体的内边缘到所述第一盖体中心的距离大于等于3mm且小于等于14mm；
    所述第一盖体的厚度大于等于0.05mm且小于等于0.5mm。
  18. 根据权利要求1-17任一所述的电池外壳，其特征在于，所述第一绝缘件的外径大于等于8mm且小于等于16mm；
    所述第一绝缘件的内边缘到所述第一绝缘件中心的距离大于等于2mm且小于等于14mm；
    所述第一绝缘件的厚度大于等于0.05mm且小于等于0.5mm。
  19. 根据权利要求1-18任一所述的电池外壳，其特征在于，所述第二盖体的直径大于等于6mm且小于等于16mm；
    所述第二盖体的厚度大于等于0.05mm且小于等于0.5mm。
  20. 一种电池，其特征在于，至少包括：电芯和上述权利要求1-19任一所述的电池外壳，所述电池外壳包裹在所述电芯的外侧。
  21. 根据权利要求20所述的电池，其特征在于，所述电芯包括第一极耳和第二极耳，所述第一极耳与所述第一盖体的第一面连接，所述第二极耳与所述第二盖体的第三面连接。
  22. 一种电池，其特征在于，包括封装壳、电芯和第二盖体；
    所述封装壳内设有用于容置所述电芯的容置腔，所述电芯中形成有与所述电芯同轴心的空腔，所述封装壳上设有与所述容置腔连通的孔洞，所述孔洞与所述空腔同轴心，所述第二盖体封盖在所述孔洞上，且所述第二盖体与所述封装壳之间设置有第一绝缘件；
    所述第二盖体是导电件，所述第一绝缘件是密封胶圈。
  23. 根据权利要求22所述的电池，其特征在于，所述第二盖体上设有朝向所述容置腔凸出的凸出部，所述凸出部与所述孔洞的边缘之间形成第一溢胶槽，所述第一溢胶槽沿所述电芯的径向的宽度为0.1～3mm之间。
  24. 根据权利要求22或23所述的电池，其特征在于，所述封装壳上设有容置槽，所述第二盖体位于所述容置槽内，所述第二盖体的外边缘与所述容置槽的侧槽壁之间形成第二溢胶槽，所述第二溢胶槽沿电芯的径向的宽度为0.1～3mm。
  25. 根据权利要求22-24任一所述的电池，其特征在于，所述电芯的下端面与所述封装壳底壁的内壁之间设有第一绝缘胶层，所述第一绝缘胶层上设有与所述空腔同轴心的第三通孔。
  26. 根据权利要求25所述的电池，其特征在于，所述第三通孔的孔径大于所述空腔的直径。
  27. 根据权利要求26所述的电池，其特征在于，所述第三通孔的孔径比所述空腔的直径大0～0.5mm。
  28. 根据权利要求22-27任一所述的电池，其特征在于，所述电芯的上端面与所述封装壳的内顶壁之间设有第二绝缘胶层，所述第二绝缘胶层上设有与所述空腔同轴心的第四通孔。
  29. 根据权利要求28所述的电池，其特征在于，所述第四通孔的孔径大于所述空腔的直径。
  30. 根据权利要求29所述的电池，其特征在于，所述第四通孔的孔径比所述空腔的直径大0～0.5mm。
  31. 根据权利要求25-27任一所述的电池，其特征在于，所述封装壳包括壳体和第一盖体，所述第一盖体与所述壳体密封连接，所述壳体和所述第一盖体围设形成用于容置所述电芯的所述容置腔，与所述容置腔连通的所述孔洞设置在所述第一盖体上；
    所述电芯上设有第一极耳和第二极耳，所述第一极耳与所述壳体的底壁的内壁电连接，所述第二极耳与所述第二盖体电连接；
    所述第二极耳与所述第一盖体之间设有第三绝缘胶层；
    所述孔洞的边缘围设形成第一通孔。
  32. 根据权利要求31所述的电池，其特征在于，所述第三绝缘胶层贴设在所述第一盖体的内壁上，沿所述电芯的径向，所述第三绝缘胶层的外边缘小于所述第一盖体的外边缘；
    所述第三绝缘胶层上还设有第五通孔，所述第五通孔与所述空腔同轴心，所述第五通孔的孔径小于所述孔洞沿径向的尺寸。
  33. 根据权利要求32所述的电池，其特征在于，沿所述电芯的径向，所述第三绝缘胶层的外边缘比所述第一盖体的边缘尺寸小0.05～2mm；
    所述第五通孔的孔径比所述孔洞的沿径向的尺寸小0～2mm。
  34. 根据权利要求31所述的电池，其特征在于，所述第三绝缘胶层贴设在所述第二极耳靠近所述第一盖体的一侧，沿所述电芯的径向，所述第三绝缘胶层的边缘距离所述电芯的轴心的距离小于所述孔洞距离所述电芯的轴心的距离。
  35. 根据权利要求31所述的电池，其特征在于，所述第一极耳朝向所述电芯的表面上设有凹陷的焊印，所述焊印位于与所述第三通孔以及所述空腔对应的区域内。
  36. 根据权利要求31-35任一所述的电池，其特征在于，所述壳体的底壁外侧为光滑的平面或圆弧面。
  37. 根据权利要求35所述的电池，其特征在于，所述焊印的深度为20～200μm；或，焊接后形成的第一焊点的高度为10～120μm。
  38. 根据权利要求24所述的电池，其特征在于，所述第二溢胶槽内还设有密封胶，所述密封胶用于密封所述第二盖体与所述封装壳之间的间隙。
  39. 一种电子设备，其特征在于，至少包括：电子设备本体和上述权利要求1-38中任一所述的电池，所述电池为所述电子设备本体提供电能。
PCT/CN2021/078680 2020-03-18 2021-03-02 电池外壳、电池和电子设备 WO2021185074A1 (zh)

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